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Chapter Text

Diluc mindlessly scrolled through his phone, passing short video clips of cute animals and streamers on his timeline as he ate dinner. It was leftover pepperoni pizza from last night, a treat considering his parents preferred to prepare homemade meals. With his parents gone for the weekend, they had given him some money to order out.

He enjoyed the last few bites of his slice as he heard the front door slam shut. Laughter echoed from the foyer, but only one of them was familiar. Really? Give his older brother any chance to have their parents gone, and he would come home with some girl from university on his arm to “watch movies with.” Diluc thought he had made it to the end of the weekend without having to hear obnoxious giggling and poorly disguised moans from his older brother’s room, but of course, the day before their parents returned was the day his brother would find a way to sneak in a conquest. At least it made for good blackmail material, especially in their religious household.

Though he could never understand how Kaeya found girls, dolled up with copious amounts of makeup and perfumes so strong that they gave him headaches, attractive. But hey, a pussy was a pussy, not that he would know or even care. He had more pressing matters to deal with, like the math assignment due tomorrow: two pages of algebra. Exactly how he wanted to be spending his Sunday evening…

“Diluc.”

He looked up from his phone to see Kaeya walk into the kitchen with a charming smile. By his side was not some glamorous bimbo, but a man with brown hair holding a bag filled with snacks. Kaeya opened the fridge to grab a few drinks.

“Guy and I will be playing some games tonight, so don’t bother us.”

Diluc pursed his lips. Of course the younger one was in the way. “I’ve got homework,” Diluc replied sharply. “So don’t worry about it.”

“Always the studious one,” Kaeya said as he grabbed Diluc’s glass of grape juice and took a swig of it—like, a quarter of the glass.

“Asshole,” Diluc said under his breath.

“Your favorite,” Kaeya replied with a wink. “I would say ask me for help if you need it, but I have a friend to entertain.”

“I won’t need it. I like to make sure that I get the answers correct.”

There was a chuckle from Guy. Kaeya placed the glass down with a sigh. “And you say I’m the asshole.”

“If the shoe fits, wear it.”

“Whatever makes you happy, princess. I’ll see you in the morning.”

Diluc frowned as he watched them leave. He wasn’t a princess. Sure he was spoiled; they both were, but he wasn’t even close to a dolled-up bimbo in a dress, thank you very much. On the bright side, he wouldn’t have to deal with overhearing his older brother fuck a girl. He would take boys screaming at a loud video game over that any day, and some headphones would solve most of those issues anyway.

He lifted his glass of grape juice to his lips and downed the remainder of it.

Subtract the six and move it to the other side, then solve for y … Diluc’s pencil scraped against the page as he heard loud bass through his headphones. He only had five questions left, then he could hop on a call with his friends and ignore his older brother, but there was no way he could focus with music that loud. You would think people would have some courtesy for a kid trying to finish their homework.

Diluc yanked his headphones off of his head as he stood up. He marched down the hallway to his brother’s room, but as he lifted his hand to knock on it, he froze. There was a whine; at least it sounded like a whine. It was hard to decipher over the music, so he pressed his ear against the door.

“Kaeya… please…”

His eyes widened and jaw dropped as he quickly pulled back. Those were the same noises the girls would make, but this person was a man, right? They couldn’t be… He swallowed thickly as he knocked on the door. There was no reply. He should walk away and let his brother do whatever twisted things he wanted to the other man, but his curiosity wouldn’t stop eating away at him. Surely a quick peek wouldn’t hurt. Besides, maybe they were doing something else, and he was reading too far into it.

He cracked the door open and peered inside. His body tensed as he saw the two of them together on the bed… fucking. Guy was on his knees, his back arched as Kaeya pulled at his hair and thrust into him from behind. Diluc could just see the sides of them, but he could see Guy’s cock, hard and leaking.

The door clicked shut as Diluc stumbled back. His heart raced as the scene of the two men replayed in his mind.

Kaeya… fucked men? And in their household blessed by Barbatos himself? How could he even think of doing that? Their mother was strict about their religion, and though they may not have the same fathers by blood, Crepus looked after Kaeya as if he were his own child. Yet the wanton moans and the wet slaps poorly disguised by music told a different story. 

And honestly, Diluc understood.

Kaeya was charming, a man that made heads turn the moment he walked by. Diluc was used to seeing it everywhere they went, but his charm went further than just his gorgeous appearance; he was also a smooth talker. The number of times he had gotten himself out of trouble with a properly timed smile and some fancy words was impressive. It didn’t stop there. The man was able to flirt like it was second nature, making girls squeal with a wink and a lopsided grin. It wasn’t fair how attractive the man was: skin so shiny and bronze as if it were kissed by the sun itself, navy hair styled to perfection, eyes that held the night sky in their orbs, and with a toned body that fucked Guy with such strength, anyone would want a piece of him.

Even himself. 

Diluc’s body trembled as he squeezed his thighs together. His cheeks burned as he felt his cock throb. No. He couldn’t be one of them. That was his older brother, for Barabtos’ sake. His older brother.

His.

The ache between Diluc’s legs was incessant, building as did the voices of the men behind the closed door in front of him. A hand darted to his cock, and he palmed himself, hoping to ease the ache, even just a bit, then he could run back to his room and pretend this never happened.

“Fuck!”

Diluc’s back hit the wall behind him as he heard Kaeya’s voice resonate, deep and delicious. It made a wave of arousal pool in his stomach. Kaeya had a smooth voice, but to hear it so raw and gruff drove Diluc crazy.

All caution was thrown away as he tilted his head back against the wall and slipped his hand under the waistband of his pants. His hand wrapped around his cock, and he let out a moan. His free hand clamped over his mouth to stifle his sounds as he jerked himself off. Very rarely did he get himself off, oftentimes finding self-disgust when he tried to explore himself, but Kaeya’s voice pushed him further, making his hips rock with a need he had never felt before. Instead of Guy bent over, it should be him. He should be stuffed with his big brother’s cock.

“You like that?” Kaeya’s voice echoed.

Yes. He did. Diluc rocked his hips faster, his hand moving quickly. He clenched his eyes shut, feeling his lash line getting damp. He knew those words weren’t meant for him, but they should be.

“You want more?”

Diluc whimpered. Please. He needed more. More than just a hand on his cock. What would it feel like to have his hole filled? He blushed, too shy to let his hand wander to his ass. Instead, he released his mouth and let his hand drift under his shirt and to his chest. He squirmed as he tugged at a hardened nipple.

“Show me your pretty face.”

Diluc’s breaths were shallow as he opened his eyes and let the tears fall. His vision was blurry, and in his horny delirium, he swore he could see Kaeya’s gaze bore into him. He bit his lip, whimpering quietly as he stroked himself in a frenzy.

“Let yourself go. I want to hear you.”

Diluc sobbed and whimpered. His hand shook as he released his abused nipple and moved toward the other, but before he could reach it, his fingers brushed against warm metal.

His Holy Lyre der Himmel pendant, a symbol of Barbatos.

Diluc’s cock throbbed, and his balls tensed, nearing his release. Was Barbatos watching him now? Could he see the way his body trembled and begged for his big brother’s cock? 

“Cum for me.”

With a strangled moan, Diluc came, spilling over his hand and making a mess of his underwear. It was the strongest orgasm he had experienced, not that he had many to compare with. His vision faltered as he was on the edge of consciousness, but the sound of the music quieting made him snap to attention. He pulled his hand from his pants and ran down the hall. Before he could open the door, Kaeya stepped out of his bedroom, looking in his direction.

“Diluc?”

Diluc froze. “Yeah?” 

“What were you doing?”

Oh. He was not ready for this. His voice was tight, and his mouth felt dry. “Getting water.”

“Right.” There was a beat of silence before Kaeya continued. “Did you hear anything?”

“Yeah, your loud music. I can barely focus on my homework.”

“Sorry. We’ll keep it low.”

“Thanks.” Diluc retreated into his room before Kaeya could say anything more. He shut the door behind him and leaned against it, looking at his messy hand. For once, the pendant that brought him comfort felt like a weighted chain around his neck, suffocating him.

Oh, Barbatos. What had he done?

Chapter Text

To confess was to absolve all sin and be free.

That’s what Diluc was taught at a young age.

His heart pounded as he sat in a wooden chair. Its rigidity provided security and safety. This was a place where he would never be judged and instead be free. Though he was fourteen, he had stepped foot into this room a few times, and he knew that he would leave feeling weightless, like he could take on the world once more.

Yet the pounding of his heart was accompanied by the feeling of nausea, and the man sitting across from him with a warm smile made his palms feel sweaty. He shouldn’t be. Seamus was always patient with him.

“Tell me your sins.”

The words were spoken gently, free of judgment. This was a safe place; it always should be. He just needed to recite the words he reflected upon earlier.

“I have disobeyed my parents.”

It was true, well, sort of. He was not allowed to have intimate encounters with anyone in their care. And he didn’t… But masturbating to his brother must have counted in some way.

There was a nod from Seamus, and Diluc continued.

“I have lied to my brother.”

“In what way?”

Diluc took in a shaky breath. “He asked if I overheard a conversation, and I said no, but I did.”

Another nod. Diluc clasped his sweaty palms tightly in his lap. He was supposed to feel a weight off of his shoulders, not like he was being suffocated by a boulder.

“Lastly, I have temptations for people close to me.” The words were spoken quietly as Diluc forced them out of his constricted throat.

There was a gentle smile from Seamus, his eyes softening. “Did you act on them?”

“No.”

“Then there is no sin. Thank Barbatos for his grace and strength in helping you overcome and resist the temptation.”

Right. It was just a thought. He didn’t act on it. However, if he were to admit that it was his brother that he lusted over, then things would be different.

In truth, he should admit it. The words, however, would not come out. His gut twisted as his penance was spoken, but he couldn’t focus. A confession was to admit his sin, but he couldn’t admit that he wanted his older brother to bend him over and rail him until Sunday.

“God of Freedom and The Seven’s Anemo Archon…”

Diluc snapped back to the present as the absolution was recited. Seamus’ eyes were closed with a hand hovering over Diluc’s head. There was one word the man spoke that Diluc replayed in his mind.

Freedom.

Would the archon of freedom truly be upset if he were to crave his blood brother?

The weight around his neck felt heavy, and the lyre sitting over his chest was more noticeable than ever.

No.

Freedom should represent everything and anything. And what if he was wrong? Then he would happily fall into the abyss if it meant that he would be filled with his older brother’s cock.

He started small. Things like wearing his fluffy robe after a shower and letting his wild curls be free—the usual, except with the addition of keeping the top part of his robe open to expose his neck and chest. It caught the attention of his brother, even if only for a moment. It could have meant many things, but Diluc chose to believe that maybe his big brother saw more from him than just an annoyance.

So he took it a step further. When they ate dinner together with their parents, Diluc made sure to lick his fingers. The food was delicious, of course, but he would rather be licking something else off of them. When he caught his brother's gaze mid-lick, he would see a blue eye harden.

It was addicting. He wanted more. To see his older brother yield to temptation. So what if this was all in his head and his brother thought he was crazy? There was a chance that he could get through. And if it wasn’t his deluded, horny brain guiding him, then his empty ass certainly was.

Curious gazes were not enough. He would dream of his older brother looming over him as he was spread and fucked mercilessly, but he wanted to feel it. Thus began the explorative touches. Subtle brushing of fingers, or a soft whispering of “thank you” in Kaeya’s ear. He could feel the way his brother would tense. Perhaps he did not like the advances, but he never voiced his displeasure. So, he must have been holding back. Diluc needed to push him past his boundaries, make him snap.

Today was that day. After weeks of careful planning, it was all for this moment.

He walked down the staircase, the oversized t-shirt he wore brushing against his bare legs as he made his way to the kitchen. Kaeya’s back leaned against the counter as he ate some cereal, but Diluc could see him pause the moment he entered the room.

“Is that my shirt?” Kaeya asked. There was a guarded hesitation that Diluc wasn’t used to hearing. It was delightful.

“Yeah, it’s comfy.” It was true. It was so comfy that it was the only thing he was wearing.

Kaeya set his bowl aside. “Did you take it from my room?”

Diluc could hear the accusation of entering his brother’s room without permission, so he tilted his head innocently. “Don’t worry. I took it from your laundry hamper.” Diluc grabbed the hem of the shirt, pulling it up to reveal his thighs. He could see the way Kaeya’s Adam's apple bobbed as he swallowed. “Do you want it back?”

“No, it’s fine. Just give it back when you’re done.”

“Are you sure?”

“Yeah.”

Diluc lowered the shirt, and he could see Kaeya relax. “Thanks. I’ll make sure to wash it when I’m done.”

“No.”

Diluc looked up in confusion, but Kaeya’s gaze was sharp. It made his heart flutter. There was nothing but unadulterated lust in that eye.

“Don’t wash it. I need to do my laundry anyway. Toss it on my bed when you’re done with it.”

Diluc grabbed the front of his shirt and lifted it to his nose, his eyes closing as he inhaled Kaeya’s scent shamelessly. His eyes fluttered open as he peered up through his lashes. “Of course. Anything for my big brother.”

The groan Kaeya made as Diluc turned and walked up the stairs filled him with immense pride and an overwhelming desire to shove his fingers in his ass.

It was date night.

At least, for their parents. Which made this the perfect night to make a move on his brother. Kaeya would be home from his evening classes soon, and then he would hop on a call with some friends to play a game. It was routine.

So why not spice things up a bit?

The mascara’s wand shook in Diluc’s hand as he brought it to his eyes. The bristles coated his lashes with black, accentuating his crimson irises and giving a darker allure to his face.

He had spent the majority of the evening studying the massive list of makeup tutorials Aether had sent him. From glamorous night out looks to natural first date looks—though there were too many steps and layers for a “natural” look in his opinion. But what did he know? He wasn’t the one with experience when it came to fashion and makeup; that was more of Kaeya’s thing. Which was why he couldn’t stop his stomach from twisting in knots at the idea of his brother seeing him like this. He didn’t want to seem like an amateur in front of him.

There was a low whistle, and Diluc looked up at his phone. It leaned against his vanity, and Aether’s face was displayed on the screen. He was dressed in cozy pajamas, lounging on his bed as they video called. “You look beautiful.”

Diluc set the mascara aside as he flushed. “I better be, with how long we’ve been at this for.”

“We're almost done. I promise. Besides, don’t you want to look good for your special someone?”

“Don’t call him that.”

“Well, if you had given me his name, then you wouldn’t have to worry about that.” There was a mischievous glint in Aether’s eyes as he smirked.

Diluc’s chest tightened. Yeah, just casually tell his best friend that he wanted to get railed by his brother… That was not an option. “Just help me finish this.”

“Alright,” Aether said with a sigh. “At least tell me how it goes after.”

“I will if we ever finish.”

“Deal! The only thing left is applying the tinted lip gloss. It’s called Cherry Bomb.”

On the vanity sat an array of makeup products Aether had gifted him, some of which Diluc hadn’t touched, like the container of white powder. The concept of “baking his face” did not make sense to him—wouldn’t he burn? He never did well in the sun, so… Fortunately, Aether had assured him that he had flawless skin anyway, so it wasn’t necessary. Some concealer and foundation was all he needed.

A small tube of red sat among the products, and Diluc picked it up. “Cherry Bomb” was written on its side in gold cursive. 

“This one?” Diluc asked as he held the tube up to the camera.

“That’s the one! A little goes a long way. Oh, and if you feel some tingling, don’t worry. It will plump your lips.”

Tingling? Diluc licked his dry lips before popping open the cap of the Cherry Bomb tube. He applied a bit as instructed, and the red stained his lips. Then he felt it. A slight tingling sensation.

“So?” Aether asked.

Diluc looked at his reflection in the mirror. His wild curls were tamed and styled to perfection, and his makeup, though simple, looked decent. He had a bit of brown eye shadow to accentuate his doe eyes, and the lip gloss made his lips look more pouty than usual. He looked sweet… and ready to be ravished.

“You did well,” Diluc said softly, still in disbelief from his reflection.

“Hold on. Show us the full outfit. I’ll get Lumine—Lumine!”

Diluc grabbed his phone as he made his way to his full-length mirror. He stood before it, flipping his camera so that the twins could see the full outfit. He shifted his weight uneasily as he looked over himself.

Lumine had outdone herself with the outfit. Navy blue lace rested against his pale skin. He wore a triangle lace bralette and lace panty set. Around his waist was a matching garter belt attached to thigh-high stockings. The tops of the stockings were lace, but the rest of the stocking was sheer.

Lumine and Aether squished their heads close to the screen; their jaws dropped.

“If whoever you’re seeing doesn’t bend you over tonight, they are crazy,” Lumine said.

“Don’t be so crass,” Aether cut in, giving his sister a disapproving stare; she just shrugged her shoulders.

“Am I wrong?”

“Well… no…” Aether replied.

Diluc ignored the sibling’s banter, captivated by his reflection. For once he did not see a cute child looking back, but a boy blooming into a beautiful man. He felt… pretty, special even.

“I look nice,” Diluc said, turning to the side to see his ass.

Both the twins snapped their attention back to him, sensing the importance of the moment. 

“You do!” Aether said.

“I would fuck you,” Lumine added.

“Lumine, could you please be serious?”

“I am,” she said with a smile. “If he swung that way.”

“Lumine,” Aether said with an exasperated sigh. But she just laughed in response.

The front door closing echoed in the house, and Diluc’s heart raced.

“I need to go. He’s here!” Diluc said in a panic. He ran around the room, setting his phone down to put his robe on. His entire body was covered, except his calves, as the robe cut off at his knees. Still, the idea of sheer tights being seen by Kaeya would be enough to show his intentions.

Through the phone he could hear the twins panic as well.

“You’ll be fine!” Aether said.

“Seduce that man!”

“Lumine!”

“He has the body for it!”

“He also has a personality too!”

“But did you see the lace on him? His ass?”

Diluc held the phone up, his face flushed. “I’ll call you later. Bye.”

“Bye—”

He ended the call, placing the phone on his vanity as he left his room. His pace was quick as he made his way down the hallway and to the staircase. He wanted to be the first thing Kaeya saw. He wanted Kaeya to be the one to see him dressed so nice.

He wanted…

Halfway down the stairs he froze. Kaeya stood by the door, car keys in hand and leather jacket over his arm. He wore a tight shirt with a neckline that plunged so deep it showed the upper part of his chest. Black eyeliner was smudged on his lash line, and he wore glitter. He looked gorgeous, more so than usual. This attire was one Diluc knew well.

Kaeya was out to fuck tonight.

And next to him was a beautiful redhead with luscious locks and sharp features like a siren. He made Diluc look and feel every bit the child he was.

“Diluc.” 

He looked up and shuddered as Kaeya’s gaze raked over his body with a ravenous hunger. He pulled the robe tighter around himself. 

“Were you planning on seeing someone?” Kaeya asked.

Diluc pursed his lips. What was he supposed to do? Tell him that this was all for him in front of some stranger? He felt his cheeks burn as he averted his gaze to the side.

“Whatever,” Kaeya said as he grabbed the other man’s hand. “The house is yours. We’ll be gone for the night. Have fun.”

The door slammed shut, and Diluc could feel it reverberate through the house. The clicking of a lock followed, and then silence.

Diluc’s heart clenched as a lump grew in his throat. He looked at the door, unseeing, hoping Kaeya would walk back.

That Kaeya would choose him.

Who was he trying to fool?

In what fantasy do brothers love each other in that way? At this point there was no clearer sign. Kaeya brought home a lot of people, but this was the first time he brought a man that looked just like him.

No.

That man had aged like fine wine. Lean and sultry, not small and cute. Hair wavy and styled to perfection, not unruly and tangled. His makeup was flawless, not the work of an amateur.

It was as if Kaeya brought him home to make a point.

And Diluc felt it.

Tears welled in his eyes, and his chest tightened as he ran up the stairs.

Why was it his brother?

Why Kaeya?

He ran into his room and threw himself onto the bed, letting the anguish bubble up into loud sobs as he curled in on himself.

Why couldn’t he love someone else?

And yet, as he sobbed on his bed, it was Kaeya’s shirt that he cradled close.

Chapter Text

Everything had changed.

Kaeya avoided him. In the presence of their parents, he was still amiable, but when they were together, his icy gaze would pierce through Diluc, freezing his heart and making it plummet into his stomach.

Any embarrassing attempts at seducing his older brother were halted. Aether and Lumine had told him that it was a first crush; that he would get over it with time.

But his heart still yearned for his brother.

Kaeya stopped bringing home his partners, opting to leave for nights when their parents were gone. No amount of games or friends could distract Diluc from imagining what Kaeya was doing or who he was with. Were they pretty? Did they writhe under his brother, begging for more?

Diluc stood in front of his mirror, his fingers tracing a lacy strap of the navy blue bralette he wore. He hadn’t touched it since the night Kaeya had rejected him, but his brother was out, as were their parents. It was another night with him alone in the silence of their house, and on these nights all his mind could do was wander to Kaeya and the fantasies he lived in. Ones where Kaeya would choose him for the night, where he would be the one holding his brother’s hand. Ones where he would dress real pretty and prep himself for his brother’s cock.

His hand traced down the strap and over his collarbones until his fingers brushed against his lyre pendant.

Perhaps this was Barbatos’ way of saying it was wrong, of freeing him from temptation.

He grabbed a shirt from his vanity and slipped it on, letting the large fabric fall to his thighs. It still smelled of Kaeya.

He should take the hand that Barbatos extended toward him.

Yet he turned from his mirror and toward his bed, climbing onto it and resting on his back. His head met his fluffy pillow, and his hand drifted to his ass. The panties he wore had lace straps that framed the cheeks of his ass and left the entire middle exposed. Easy access, as he liked it. He pulled out the butt plug that was nestled between his cheeks with a whimper. Empty walls clenched desperately, seeking to be filled again. 

It didn’t matter how many times Barbatos’ hand was extended toward him. He would always succumb to the fantasy that was his brother.

He placed the butt plug on the table beside him and swapped it out for a bottle of lube. With shaky hands he coated his fingers before pushing one inside his ass. He whimpered, feeling his body give way to it with ease. Then he added a second, slowly thrusting inside. His body trembled, and a shock of pleasure raced up his spine as he hit his prostate. He spread his legs eagerly, letting the shirt ride up his body and bunch around his hips. A third finger was added, stretching him wide as he plunged into his needy hole. Each thrust hit his prostate in ways that made his vision go white, and he chased that pleasure. His cock strained in his panties, leaking and begging to be touched, to be free. But Diluc refused to touch it, wanting to come undone from his fingers; after all, that’s what his brother would want.

“Show me your face.”

Kaeya’s voice rang in his head, as clear as the night he overheard him, and his fingers moved faster.

“Let yourself go. I want to hear you.”

He whimpered, desperately folding himself in half, spreading himself for his brother’s cock to spear into him.

“Kae—”

“Diluc?”

His body tensed, and his fingers halted deep inside of him. 

There was a knock on the door. “Diluc, are you okay?”

Diluc took a few shaky breaths, trying to steady himself before he answered. “Yes, just tired.” He flinched at how raw his voice sounded.

“If you say so. I got pizza for dinner. It’s on the kitchen table.”

“Thanks. I’ll be down in a bit.”

“Okay.”

Then silence. Diluc could hear his heart pound in his head as he waited with bated breath. Had Kaeya heard? Minutes passed, but he heard nothing. His cock twitched, and his walls fluttered around his fingers. Surely he hadn’t been that loud, otherwise his brother would have said something. He dragged his fingers out of his hole, leaving the tips inside before plunging back in. His free hand clamped around his mouth as he moaned. There was no way he could go downstairs the way he was now. He would need to finish quickly.

His fingers thrust rapidly, his hips rocking in tandem.

“Cum for me.”

Tears pricked his eyes as he neared his release. “Kaeya—”

The door handle rattled, and Diluc’s eyes snapped open as he tore his fingers from his ass. He pulled the shirt down as he scrambled into a sitting position, staring at the door.

Kaeya stood with a hand on the handle, opening it wide. Across his face was shock.

“What the fuck happened to knocking before entering?” Diluc said, his eyes burning with rage as he glared at Kaeya.

“It’s hard to remember when your little brother is moaning your name.”

Kaeya stepped into the room, and Diluc watched a starry pupil rake over his body, wide with disbelief. “And you’re wearing my shirt while you have fun?”

Diluc snapped, his eyes wet with tears. “If you’re here to make fun of me, then get out.”

“I… I just can’t believe—”

“Then get out.” Diluc’s heart squeezed tightly, and his gut twisted.

“Tell me I’m wrong. There is no way I’m seeing this right now,” Kaeya said.

Diluc stood from his bed, tugging the shirt down. “If you think it’s disgusting, then get out, and we can pretend that this never happened!”

“Diluc…”

“You probably think that I look ridiculous,” Diluc said. He wanted nothing more than to rip the shirt and tights off his body and crawl into his bed, to forget this even happened. “Just get out and stop looking at me like I’m a freak!”

“Well, forgive me for not thinking that my little brother would try to seduce me!” Kaeya snapped, his jaw tensing.

Diluc’s shoulders shook with his heavy pants as his tears spilled over, staining his cheeks. He marched up to Kaeya, grabbing the other’s shirt with his hands. “I am.” His voice cracked as he continued through a sob. “I have been for weeks!”

“Luc…”

Diluc pulled the other down, eyes narrow as he whispered harshly. “But I know that I can be replaced by any pretty redhead.”

He reveled in his brother’s horror as he pushed the other back. Adrenaline rushed through him, mixing with waves of anger, and his body shook. His chest, however, tightened so much that he felt himself gasping for air.

He needed to get away.

He tried to move past Kaeya, but arms wound around his waist. His room blurred as his feet left the ground, and he gasped as he was tossed onto his bed, his body bouncing on the mattress. He felt a weight crawl over him, pinning his wrists beside his head.

“How long?” Kaeya asked.

Diluc pursed his lips as he struggled to free himself. A knee pressed against his stomach, pinning him in place. The grip around his wrists tightened as Kaeya leaned down. His vision was consumed by his brother, but there was no way he was going to lie here and take a scolding from the man he loves. It was fucked up to love his brother; he knew that. He didn’t need to hear it from the man himself.

“Get off!” Diluc glared fiercely, blinking through his tears, but Kaeya did not move.

“How long, Diluc?”

Diluc sobbed. He was trapped. There was no way to escape his brother. His body went lax. “When I heard you with Guy.”

“The first time I brought a man home…” Kaeya murmured. Realization flashed over his face. “Your touches, the way you looked at me, my shirt.”

Kaeya’s hand gripped the hem of the shirt, and Diluc shuddered as it was pulled up. He looked at the wall, avoiding his brother, but he could feel the other looking over his body. Cold fingers touched his bare skin, and Diluc whimpered. 

“Who?”

Diluc looked up, confused.

“Who was this for?” 

A finger brushed over the lace garter belt resting over his navel. Diluc licked his lips. “You,” he breathed.

Kaeya’s body tensed, his starry pupil blown wide.

“I wore it that night you brought the redhead home,” Diluc started softly. Then his voice took on a sharp edge, like he was spitting venom. “But you chose him instead of me!”

Diluc’s eyes widened as he felt lips press against his own. They were firm, yet gentle, a feeling so new and foreign to him. He had never kissed anyone, and for his brother to be his first was a dream come true.

He wanted his brother to take all of his firsts.

The lips retreated to kiss his wet cheeks, the action causing more tears to spill over.

“I’m sorry,” Kaeya whispered. “You were so beautiful that night, with your hair and makeup done like you were a gift ready to unwrap. I thought that my brother had found his first crush. That you were going to spend the night with them dressed like… that.”

Diluc whimpered as his brother pulled back and looked at him with an insatiable hunger. 

“If I had known it was for me…” Kaeya said, rocking his hips forward, making his hard bulge press against Diluc. “I would have fucked you on the floor in front of him.”

Kaeya’s hips continued to rock into Diluc, as if mimicking what he would have done differently that night. As his pace increased, Diluc could feel himself press deeper into the mattress, arousal coiling in his stomach.

“Is this what you wanted from your big brother that night?”

“Yes…” Diluc moaned, his hands gripping the bed sheets as Kaeya rocked into him.

“Then let me correct my mistake.”

The rocking stopped, but Diluc felt a hand caress his hip.

“Lace looks beautiful on your skin, Diluc, and as much as I want to fuck you with these on”—Kaeya pulled at a strap of the lace panty—“I want to see my precious brother’s cock.”

Swift hands unfastened the clasps of the garter belt attached to his thigh-high tights, and the panties were torn off his legs. Diluc’s cock sprang free, hard and leaking. A hand wrapped around it, and Diluc whined.

“So small and cute, just like you,” Kaeya cooed, stroking it slowly.

“I’m not cute,” Diluc said with a pout.

“Oh?” Kaeya gave a teasing smile as he released the cock in his hand. “You’re right,” he said softly, his grin turning wolfish. “You’re a beautiful vixen ready to take his big brother’s cock.”

Diluc’s breath hitched as he watched Kaeya lean back and pull his shirt over his head. His older brother’s muscles rippled with every movement, and Diluc's lips parted, his breaths quickening. He had seen his brother shirtless many times, at the beach or after a shower with a towel hung low around his waist, but the man towering over him made his heart race. Kaeya gave him a playful wink, and Diluc flushed.

“Like what you see?”

Diluc could only nod his head, his eyes drinking in his brother’s muscular frame. His eyes drifted down until they met a trail of blue hair that led under the other’s waistband. Kaeya chuckled before removing them, leaving him naked. Standing erect and pulsing was his cock with pearls of white leaking from its tip. It was massive, larger than anything Diluc could imagine. Though Diluc had experimented with his fingers and some toys given by Lumine, nothing could compare to the length and girth of his brother. He wasn’t sure if it would all fit; still, his legs spread further as his vision clouded.

Kaeya stroked his length leisurely, and Diluc whined, squirming on the bed. “Patience, Luc. I need to get some lube.”

“Table,” Diluc replied breathlessly.

The bed shifted as Kaeya leaned over him. Finally, he would get the cock of his dreams. Diluc’s cock throbbed, aching for the release that was robbed from him earlier. Now the stolen pleasure had returned tenfold, making him restless.

“Oh my, what other secrets is my dearest brother hiding from me?”

Diluc looked up. His cheeks burned as he saw Kaeya wave the butt plug over him.

“Did you have this in you earlier?”

As if Kaeya walking in on him wearing lingerie and moaning his name wasn’t enough to embarrass him. His brother finding his toys was not something he ever expected to face. Diluc nodded his head, watching the metal toy glisten in the light, still covered in lube. Kaeya set it back on the table and grabbed the lube, opening it up and lathering his fingers with it. His gaze hardened as he plunged two fingers into Diluc’s ass. There was no resistance.

“And who taught you how to use them?”

There were only two fingers inside of him, but they reached so far. Diluc’s toes curled. “No one. I—” Diluc gasped as Kaeya prodded his prostate. “I taught myself.”

“You did? Who was it for?” There was a mischievous glint in Kaeya’s eye. Diluc bit his lip. His brother knew the answer; he just wanted him to say it. That asshole. But Diluc was now three fingers full, and his mind was hazy with pleasure.

“For you,” Diluc said, his back arching as his brother massaged his prostate.

“So thoughtful to your big brother, aren’t you?”

Another jab at his prostate, and Diluc moaned. He nodded his head, eyes unseeing.

There was another chuckle from Kaeya as his voice dropped. “No one touched you like this, right?”

The fingers inside of him curled, and Diluc shuddered. Though his brother sounded playful, there was a dark edge to his voice.

“No one,” Diluc said. He could see a possessive hunger shine dark in his brother’s blue eye. “I was waiting for you.”

A kiss was pressed to his forehead, making Diluc melt. He would do anything for his brother if it meant that he would get more sweet words and kisses. Kaeya withdrew his fingers.

“When you need a cock in you. Come to me. No one else. Okay?”

“Yes, Kaeya.” A hand held his chin, a thumb brushing over his lower lip.

“That’s right. Who will you go to?”

“You.”

“Who?” 

Kaeya watched him closely, claiming him with only a gaze. It was suffocating.

“My big brother.”

Kaeya groaned and Diluc felt the head of his brother’s cock press against his entrance. “My little brother only needs one cock, right?”

“Yes,” Diluc said as he felt the head tease him.

“Good. Then take it.”

The cock pushed through, stretching him wider than any toy he had played with. Gradually it filled him, but it felt endless. Pain shot through Diluc, and he clawed his brother’s shoulders. “Too much!”

“You can take it,” Kaeya cooed, kissing the tears streaming down Diluc’s face.

Diluc shook his head. No, he couldn’t. He felt like he was splitting in half. “I can’t!”

“You can. It will get better. I promise,” Kaeya said softly as he showered his face with kisses. The action, though tender, was not enough to distract Diluc from the thick cock spearing into him.

“Kae…”

“You wanted this. Remember? Who was calling my name while wearing my shirt?”

Diluc sobbed, gripping onto his brother like a lifeline. “Me.”

“So take all of your big brother.”

Kaeya emphasized his point with a final thrust, sheathing himself fully inside. It was intrusive and uncomfortable. Diluc had never felt so full. A hand pressed against his stomach, and he whimpered.

“You’re so small... My cock makes your stomach bulge so pretty.”

Diluc peered down between them, and sure enough, he could see his brother's cock make his stomach protrude obscenely. Hands wrapped around his waist, and Diluc blushed when he realized that his brother’s hands could encompass the entirety of it. Kaeya’s thumbs rubbed the bulge, and they pressed down as his cock retreated. A sharp thrust forward made Diluc’s belly bulge, and he cried out. However, Kaeya didn’t let up. He continued to thrust into him, stretching him wide. But one particular thrust made Diluc’s eyes widen and his back arch. His nails dug into his brother’s shoulders.

“Kaeya! There!”

“Anything for my precious little brother.”

The hands on his waist pulled the shirt over his head before moving to his thighs and folding him in half. Diluc whimpered as Kaeya was able to push deeper from this angle and hit the spot that made him see stars. Then his brother resumed his thrusts, aiming for slow and deep movements to hit as deep as possible. Pleasure coursed through him, stronger than ever.

“Yes! K-Kaeya!”

Diluc’s cock ached, leaking and bouncing between them.

“Fuck. My sweet brother is so tight. You’ll be good for me, won’t you? Be my personal whore?”

The words were repulsive, but they made Diluc ache harder. What sort of freak was he? Not only wanting his brother, but also wanting to be ruined and degraded by him too… Still, he was greedy for his brother’s affection in any capacity. 

He wanted more.

“Yes! I’ll be my big brother’s personal whore,” Diluc said, his breaths labored.

Kaeya licked the tears streaming down Diluc’s face before moving to his neck. Languid licks turned into teasing nips, then possessive bites, making Diluc scream.

“I’ll fuck you in every room. Mom and Dad don’t need to know,” Kaeya whispered. He moved to Diluc’s ear, his breath hot. “Unless you want them to.”

“Mmmmmm… Kae—” Diluc’s eyes rolled back at the thought. He clenched around the cock spearing into him, and Kaeya hissed.

“What a perverted little brother I have. You like that, don’t you? Your big brother fucking you in front of them?”

“Please!” Diluc sobbed, his breaths shallow.

“I’ll have you on my lap with a blanket covering us. They won’t know my cock is up your ass, but you need to be a good boy and keep quiet. You will, won’t you?”

“I will! Kaeya!” Diluc squealed as he felt a harsh slap on his thigh. The pleasure was building too fast; he was too full. He whimpered as he corrected himself. “B-big brother! I can’t—”

He felt Kaeya nip his collarbones until they stopped and there was a tug at his neck instead. Diluc looked up in shock. Kaeya hovered over him with the lyre pendant between his teeth as he smirked.

A fresh wave of tears streamed down Diluc’s cheeks.

Oh, Barbatos.

Was Barbatos watching now? Could he see how deeply his brother fucked him? Did he despise the sinful act between two brothers?

Or perhaps, Barbatos would bless their act of freedom.

The pendant thudded against his chest.

“Go ahead,” Kaeya said. “Be a good boy for me and Barbatos.”

At the mention of Barbatos’ name, Diluc’s walls clenched harder and his cock throbbed. He was right at the pinnacle of his climax, and Kaeya continued to watch him intently, making sure to drink in every expression he made.

“Cum for your big brother.”

“Brother!” Diluc cried, his head fell back, and his toes curled as he spilled between them, his body writhing.

“Fuck! Diluc!” Kaeya folded him deeper in half, ramming into him like he was nothing but a toy. But the sweet words coming from his mouth contrasted with his animalistic pace.

My precious little brother. 

So good for me. 

You came so beautifully.

The words echoed in Diluc’s head, making him feel a fuzzy warmth fill him as his brother chased his pleasure.

Soon Kaeya faltered, his hips stuttering before spilling deep inside. “My brother.” Kaeya groaned as he spilled inside.

Diluc wrapped his arms around Kaeya, holding him close as he felt his brother fill him. It was nice to not be left wanting or empty. He leaned up to kiss Kaeya’s cheek. Their breaths evened out, and Kaeya leaned down for another kiss, parting Diluc’s lips and deepening it.

Diluc could feel his body relax onto the mattress as Kaeya gently pulled out.

“Diluc?”

“Mmmm?” Diluc blinked up, sleep threatening to drag him into a blissful slumber.

“That face is only for me. Promise you won’t show it to anyone else.”

Diluc gave a weak nod. “Only for my big brother.”

“Good. Now rest.”

A kiss was placed on Diluc’s forehead, but he struggled to stay awake for a moment longer. He lifted a hand to cup his brother’s cheek. “Want you to need me only… Kae…”

A soft smile unfurled over Kaeya’s face as he kissed the palm of Diluc’s hand. “I promise I will. I don’t need anyone other than my precious little brother.”

Diluc raised his other arm, a pout on his face. Kaeya chuckled before indulging him with the silent request for cuddles. He showered Diluc’s face with kisses. “Sleep.”

As much as Diluc wanted to bask in the afterglow with his brother, his mind was fading. At least he would sleep with his heart and ass filled with his brother’s love.