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“Then I’m definitely topping.”

Summary:

Kou and Mitsuba get a bit steamy when Kou stays the night at the school with him. Kou thought he’d be the one to top if anything like this happened, but Mitsuba disagreed.

Notes:

I’m so sorry for my like, zero posting of new stories/updating stories. I’ve been very busy these past few weeks and haven’t found the time to write. Of course it’s like, late at night when I should be sleeping when I’m writing this because I… I need to get my slutty size difference kink out there with my favs, and this is the only thing I could think to write at the moment.

(See the end of the work for more notes.)

Work Text:

     Kou’s breath was heavy as Mitsuba laid on top of him, holding his face and kissing him passionately. His hands held Mitsuba’s face as well, thumbs gently stroking the cold ghostly skin. He never found Mitsuba’s lack of warmth disturbing, he could never find anything about Mitsuba disturbing.

      “Minamoto…” Mitsuba whispered his name, his voice full of love and passion. Kou bit the boys lower lip and elicits a moan from them. Kou’s body shivered with anticipation, the passion from this kiss wasn’t like any other day. He’s getting hard, he knew he was, as embarrassing as it is.

      Mitsuba broke the kiss first, panting and resting his head on Kou’s chest. Kou allowed himself to take a break too. His face is flushed, and his groin throbbing a bit.

      “That was nice.” Mitsuba says, looking up at Kou and smiling. Kou smiled back, leaning forward and kissing him on the nose.

      “Yeah, it was really nice.” Kou replied with a soft smile. Mitsuba gave a pleased smile and looked away, but he couldn’t hide the grin on his lips. Kou wanted to ask for more but he was already hard. He was embarrassed by that, would Mitsuba get grossed out if he saw it? He fidgeted a bit, motioning to Mitsuba he wants to stand up.

      “If it’s about your hard-on, I already know,” Mitsuba gave Kou a knowing smirk. Kou groaned and hid his face in his hands.

      “Crap, I-I’m sorry, it was just a bit intense today.” Kou apologized, feeling shameful towards his uncontrollable bodily functions. Mitsuba giggled, then suddenly rubbed his crotch against Kou’s. He let out a small moan, his eyes wide as he moved his hand to look at his lover.

      “I don’t mind. I’m a bit hard too,” Mitsuba admitted, though clearly embarrassed. Kou gave a shy smile, but pushed the boys hair behind his ear.

      “Don’t be embarrassed. It’s natural.” Kou says comfortingly. Mitsuba pouts from the embarrassment, and hid his face in Kou’s neck. Kou chuckled and pat his head, but let out a soft groan when Mitsuba grinds his hips again.

      His hips slowly move against Kou’s, the friction between their clothes made Kou feel really good. He moans softly and holds Mitsuba’s hips, Mitsuba holding onto his shoulders and letting out tiny gasps. 

      Kou helped guide the ghosts hips, even moving his own against theirs. The stimulation from inside the fabric felt really good, he wanted to feel more.

      Kou starts to slide Mitsuba’s pants off, Mitsuba trying to help but not wanting to stop moving his hips. They manage to slide his underwear off too, leaving Mitsuba’s leaking cock rubbing against cloth. Mitsuba spoke with a breathy voice as he reached for Kou’s belt. “T-Take yours off too.”

      Kou nodded rapidly and quickly undid his belt, sliding his pants down, the small moment where Mitsuba paused to allow them to be slipped off making him whimper. When they were just to the knees, Mitsuba humped against the boys slippery cock, unable to keep them together with all the pre making it so slippery.

      “K-Keep going,” Kou mumbled, holding their dicks together. They both moaned and moved their hips against one another, and a certain sensation was growing in Kou. “I think I’m- Im gonna…”

      Mitsuba nodded and bit his lip, moving his hips faster. Kou shut his eyes and let out a loud moan, and after a few more rolls against his cock, he came, along with Mitsuba, the while fluids falling onto Kou’s stomach. 

      Kou’s breath was heavy, and he felt a bit dazed, but Mitsuba’s cold hand wiping the semen off his stomach helped him focus on reality. Mitsuba’s come-covered hand was brought to his own mouth, as he looked at Kou with a smirk, licking it away. Kou’s face flushed again but he couldn’t bring his eyes away from Mitsuba’s tongue lapping over his fingers.

      Mitsuba leaned down and licked it off Kou’s stomach, making him jolt and even giggle a bit. “Don’t lick it, I’m ticklish!” Kou whined, pushing Mitsuba’s head away. Mitsuba hummed in response but didn’t stop till it was all gone. Kou let out a few breathy laughs, looking up at the ghost lovingly.

      “You taste good.” Mitsuba said, sitting up. Kou looked away from embarrassment again, and Mitsuba laughed this time. “What? It’s the truth.”

      “Still embarrassing.” Kou grumbled, pouting. Mitsuba smirked and stuck his tongue out, leaning close to Kou’s face.

      “I can prove it to you,” He teased, and Kou rapidly shook his head and pushed Mitsuba’s face away.

      “N-No thanks.” He replied and turned his face away. Mitsuba laughed again and sat back up, wiping the sweat off his forehead with his sleeves. Before Kou realized what he was about to say though, the words slipped out of his mouth. “You’re a lot bigger than I thought you were.”

       “What’s that supposed to mean?” Mitsuba replied immediately, looking offended. Kou sat up and waved his arms in defense.

      “I-I didn’t mean anything rude! Just that, you know, I-I thought you’d be… smaller. Not my size.” Kou said, smiling nervously. Mitsuba crossed his arms and narrowed his eyes at Kou. Kou and Mitsuba’s dicks were about the same size, the dicks barely reaching past Kou’s underwear tan line when erect. Kou didn’t know if they were both too small or too big, but he didn’t expect Mitsuba to match.

       “Why?” Mitsuba asked, puffing out his cheeks. Kou couldn’t help but think the expression was cute before answering.

      “I just did? I mean, you’re a bit shorter than me… I-I don’t really know, okay?” Kou mumbled, rubbing the back of his head. Mitsuba’s narrowed eyes only closed further. Kou sighed. “I mean, I’m still bigger. But does that mean I get to top if we go further?”

      “Nuh uh!” Mitsuba shouted, his eyebrows knitted together. Kou tried to speak again but Mitsuba interrupted. “If the one with the bigger dick gets to top, then I’m definitely topping.”

      “But you’re smaller than-“

      “Look away for a second!” Mitsuba shouted. Kou was confused, raising one eyebrow, but Mitsuba insisted. Kou eventually turned his body away, letting Mitsuba do whatever he needed.

      “Why do I need to look away?” Kou asked, trying his best not to peek behind him.

      “Cos’ it’s embarrassing.” Mitsuba replies, then started to explain. “I don’t know if this is for every supernatural or school wonder, but I can change certain physical aspects of myself.”

      “Aaaaand…?

      “That means I can make myself have a big dick.” Mitsuba said with a snarky voice. Kou turned around, and suddenly Mitsuba had a much larger dick, this thing was fully erect and well above his belly button.

      “What the hell!?” Kou shouted, his eyes wide and face red. Mitsuba but his lip and grinned, he obviously liked Kou’s reaction. “There’s no way you’re topping me with that- I-It wouldn’t even fit!”

      “It doesn’t have to go all the way in,” Mitsuba reasoned as he leaned forward and grabbed Kou’s chin. Kou tried to back away but Mitsuba pushed him into the bed again, the tip of his cock resting on Kou’s stomach. “Aw, c’mon Minamoto, it’ll feel super good~”

      “M-Mitsuba, seriously…” Kou grumbled, his face heating up so badly he felt dizzy. Mitsuba leaned down and kissed his cheek with his cold lips.

      “I’ll make sure you’re nice and stretched, okay? I’ll make sure it won’t hurt.” Mitsuba tried, kissing Kou’s cheek lovingly. Those words only made Kou’s heart race faster. It certainly wasn’t helping him. What would he have to go through for that to even fit!?

      “No way, it won’t fit…” He mumbled, turning his face to the side. Mitsuba kept kissing his cheek, trying to be soft to convince him. Kou wanted to let it happen but he was a bit scared… It was seriously huge.

      “Half of it will at least.” Mitsuba insisted, kissing Kou ear and nibbling on it. Kou whined but finally gave in.

      “Fine! Okay, you can. J-Just… make sure it doesn’t hurt.” Kou said, looking up at him with teary eyes. Mitsuba nodded rapidly and kissed him gently. Kou kissed back, trying to let it distract him from his racing heart.”

      “I will, promise.” Mitsuba says, his hands moving to unbutton Kou’s shirt. He shivered but helped Mitsuba do it, throwing the button-up to the edge of the bed and then removing the undershirt. Kou was now fully naked, and he felt so exposed… But Mitsuba wasn’t staring too long. He started to kiss down Kou’s jaw and neck, being gentle with it all. His cold hands held the boys hips, tightly yet comfortingly.

      Mitsuba licked the boys nipples- they were a lot more sensitive than Kou thought they’d be, not to mention the feeling of the cold, wet tongue on his skin was strange. He let out small gasps of a feeling he couldn’t quite mame yet, his hands untying Mitsuba’s hair so he could properly hold onto the locks. Mitsuba made sure both were covered in saliva before suddenly grabbing Kou’s thighs and pushing them apart.

      “H-Hey! At least warn me before you do something like that!” Kou shouted, wacking Mitsuba on the head. He winced and glared at Kou.

      “Did you expect me not to spread your legs open?” Mitsuba asked, as he started to lick his own fingers for a reason Kou didn’t process yet.

      “Well, not without a warning…” Kou grumbled, staring at Mitsuba with narrowed eyes as well. His hands wiped his face and he laid his head back, trying to calm down. This was so embarrassing… Was he really about to let Mitsuba dominate him like this? Maybe he could turn the tables and be the dominant one instead? But a certain feeling on his butt made him yelp.

      “What? I need to do this so I don’t hurt you.” Mitsuba said as he rubbed two of his fingers against Kou’s hole. His face turned a dark red and he tried to close his legs, but Mitsuba used his scarf-arms to keep them wide open. He grinned up at Kou. “Oh, it must suck to be you.”

      “You’re mean.” Kou huffed, his eyes watering. He shut his eyes and turned away, his body trembling just from the feeling of those hands. He knew what was coming, and he wasn’t prepared for it. He got an idea though, if anything got too tense. “Uh, aren’t we supposed to have a safe word for these kinds of things?”

      “Oh, do we?” Mitsuba asked, tilting his head. Kou nodded vigorously, much to Mitsuba’s amusement. “You can choose it.”

      “Uhm, okay… I-It has to be something I wouldn’t say during it…” He looked up at the ceiling, trying to think of a good safe word to distract him from his increasing heart rate. “What about, uhm… pineapp—!”

      Kou was cut off by Mitsuba shoving those two fingers inside. Kou let out a loud gasp as he looked down, it felt weird, and it kind of hurt. Mitsuba’s cold fingers felt so strange inside his warm body, the saliva doing little to help. 

      “Sorry, what was the safe word?” Mitsuba asked with a cheeky grin, moving the fingers around a bit. Kou whimpered and reached forward to grab Mitsuba’s wrist.

      “Pineapple, idiot! D-Don’t just do that!!” Kou shouted, his eyes teary again. Mitsuba moved his fingers out before Kou could grab his hand. Kou let out a strange noise, now feeling a bit empty but relieved. Mitsuba frowned, butting a hand to his chin, but his scarf-arms kept Kou’s legs spread.

      “I’m pretty sure it’s supposed to feel good,” Mitsuba said, and Kou tried to ignore his large throbbing cock that was somehow defying gravity (at least that’s what Kou felt like it was doing) and now managing to stand up fully. Kou stared at him with a pouty face.

      “Do you know anything about sex?” Kou finally asked. Mitsuba nodded, then cringed. 

      “I know enough that I can figure out how to make this feel good.” Mitsuba says, pushing Kou down by his chest with one hand. Kou was about to protest whatever Mitsuba was going to do, but was too stunned when Mitsuba’s face moved down, and he felt the cold supernatural tongue on his hole. “This should feel good.”

      “D-Don’t!” Kou cried out, trying to push Mitsuba’s head away in a panic. Mitsuba didn’t listen though, and started to lick at his tight entrance, bringing his hand back so he could spread Kou’s ass apart to try and get inside. Kou shivered, the sensation was nothing he’d felt before. He couldn’t say it was good, but he couldn’t say it was bad either.

      “I’m not stopping until you say the safe word.” Mitsuba told him, lifting his head up and sticking his tongue out. He grinned again, and his tongue suddenly got a bit longer than normal, the end of it being skinnier than a tongue would be. Kou stared with wide eyes as Mitsuba dived down again, his tongue finally managing to squirm inside.

      Kou threw his head back, his hands gripping on tightly to Mitsuba’s head. He could feel that cold and wet tongue entering him, somehow getting longer than it should. It felt good, it felt super good, he had to bite down harshly on his lip so he wouldn’t cry out.

      “ Cooth ,” Mitsuba said incorrectly, trying to say cute but his tongue was too occupied to make the proper sounds. His fingers kept Kou’s hole spread open for his tongue to be able to go in and out. Kou tried not to moan, but he couldn’t stop himself from the small whimpers and whines of pleasure he made.

      Then Kou felt the tongue leave, and the boys fingers enter. It felt lot better than before. He shut his eyes and let out small moans, feeling those fingers move in strange ways, scissoring and moving in and out, whatever could pleasure him. 

      “You really like this dont you?” Mitsuba teased, leaning forward and kissing him gently. Kou moaned into the kiss, immediately grabbing onto Mitsuba and holding him close and tightly. With every little thrust of his fingers, his hands would tense, then unclench, then clench again. He loved this feeling, he felt amazing.

     Soon Mitsuba stuck three fingers in, then four. Kou felt dizzy with it all, it made him feel so dazed, all he could feel was pleasure, just from this. The tip of Mitsuba’s cock was dragging all over Kou’s stomach, the pre leaking onto his stomach and being spread with little movements. Kou wanted more, he wanted to feel whatever euphoria he could, he was sure Mitsuba would fit.

      “Put it in, Mitsuba ~” Kou moaned out, having to tear his lips away from Mitsuba’s forcefully in order to speak. Mitsuba grinned and not Kou’s bottom lip, before exploring his mouth again and removing his fingers. Kou’s body felt so empty without Mitsuba inside him, an almost unpleasant feeling, almost intolerable.

      “So eager~” Mitsuba teased, pulling away from the kiss again. Kou whined, he wanted Mitsuba’s lips on his, he wanted to feel Mitsuba so badly. Mitsuba commanded the scarf arms back to their original positions, but being a plain scarf. Kou reached down and grabbed his thighs himself, trying to spread himself wide open for Mitsuba’s thick cock.

       Mitsuba held his cock up to Kou’s hole, rubbing the tip against it. He chuckled when Kou whined, his hips wiggling, wishing they would enter him already. Kou’s own cock was throbbing, somehow he hadn’t came yet. He wanted to come too, he wanted to feel Mitsuba’s cock fill him up and push all the come out of him.

      “How big am I really, compared to you?” Mitsuba said, standing on his knees and putting his dick over Kou’s dick and stomach so they could see how large he was. It reached a bit above his belly button, and Kou could barely feel that initial fear anymore as he saw how deep Mitsuba could shove himself in if he wanted. Mitsuba bit his lip as he started down at this. “Ah, wow, I’d be really deep inside you… You seemed so scared before, Minamoto. Why aren’t you now?”

      “Does it matter? J-Just put it in, please !” Kou begged, trying to spread his legs further, his hands struggling to hold onto his own sweaty skin. Mitsuba stared at Kou for a few seconds, his expression unreadable. Then he positioned himself quickly, and rammed himself inside Kou.

      Kou let out a scream, his eyes and mouth wide open. He held onto the bed sheets tightly. He could feel it so deep inside him, the throbbing, pulsating cock that was so cold yet so warm, so fucking good inside him. He let out a loud cry, throwing his head back into the pillow. Mitsuba let out a low grunt, pushing as far as he could until he was balls-deep inside Kou.

      “You’re so tight , it feels so good inside you, Minamoto ~” Mitsuba moaned, his eyelids fluttering from his own pleasures. Kou was in pure euphoria, it felt so good, all he could feel or think about was the ghosts cock buried inside him.

      “Y-You’re so deep Mitsubaaaa…” He moaned out, stretching the boys name out. His body quivering from his size, he tightened and loosened, his body trying to adjust from the huge intrusion. Mitsuba grabbed Kou’s hips tightly, leaning forward to kiss Kou deeply. Kou could only kiss back with so much enthusiasm, his mind preoccupied with the feeling inside him.

      One of Mitsuba’s hands traced up Kou’s shaking hips, but he stopped when he reached the boys stomach. He stopped the kiss, grinning and rubbing the new come that was on the boys stomach. “You came from that? I never even touched your small little dick. You’re so easy, Minamoto.”

      “Shhh, sh-shut up,” Kou whined, his dewey lashes interfering with the clear view he should’ve had of his lover. Mitsuba giggled again, then his hands grabbed tightly to Kou’s hips again, and he started to move, thrusting in and out, slowly but oh so calculated and pleasuring.

      He could feel it move in and out, Mitsuba’s hand reaching out once again to Kou’s stomach. “I-I’m so big, you’ve got a- ah- bump here~” 

      Kou forced his head up to look at his own stomach, he could see a bump having formed in his stomach from how large Mitsuba was. That made him tighten again, and Mitsuba sucked in air through his teeth.

      “Oh god, you like me pointing that out don’t you?” Mitsuba said, smirking but slowly and obviously losing his composure. Kou nodded mindlessly and threw his head back again, letting his loud moans, Mitsuba’s loud grunts, and the slap of skin against each other fill the air. 

      Mitsuba’s pace became quickly, his nails digging into Kou’s hips. He didn’t care, he didn’t care that the ghost’s nails hurt, he wanted to feel this. He wanted to feel the boys cock move in and out of him, hitting every little spot, making his back arch and his eyes roll back from the pleasure.

      His moans were so messy, his mouth full of drool. Mitsuba leaned down and kissed him so sloppily, their saliva mixing and getting all over Kou’s lips. Kou could barely reciprocate, the wonder’s powers were obvious- they could give themselves this huge of a cock, they could easily overpower Kou.

      Kou let out higher pitched cries, a knot forming in his stomach. “Im g-gonna come~!” He cried out to his lover, his hand reaching out to pull them close. Mitsuba nodded and wrapped his own arms around Kou, kissing him with such vigor again, always returning to that sweet mouth. Kou’s nails dug into Mitsuba’s still-clothed back, as Mitsuba was reduced to desperate little humps, but still moving so fast. 

      Kou’s moans got so loud, he was almost afraid that any students that were possibly let in the school halls would hear them through the mirrors. The thought, after a few seconds, only made his dick throb again, bringing him closer to the edge, closer and closer, until he finally came with a loud cry of pure pleasure.

      Mitsuba stopped his pace and held Kou tightly as he came, thick streams of semen shooting deep inside Kou. Kou could feel the somehow warm fluid inside him, and he loved it, every bit of it. 

     “You’re so good for me, so good,” Mitsuba said breathlessly, kissing Kou one last time, their tongues mixing lazily together before the ghost pulled out, a whine leaving Kou’s mouth, and collapsed on top of Kou. Koi took a while to catch his breath, to even leave that state of mind that could only think of Mitsuba’s dick. 

      When Kou finally started to return to reality, he noticed that Mitsuba’s dick wasn’t so large as they laid on top of him. He didn’t care that Mitsuba changed it back. That cock made him feel good, big or not. He forced his hand to hold Mitsuba’s head, squeezing his hair gently to let him know he was still awake. Mitsuba snuggled against Kou, their breathing finally starting to calm down.

      “Thank you, Mitsuba…” Kou mumbled, his eyelids fluttering. He was tired, that took a lot out of him. Mitsuba let out a tired laugh.

      “You’re thanking me for that? You must’ve felt really good…” Mitsuba joked, but he yawned too. Kou closed his eyes and let sleep pull at his consciousness. He wanted to feel that pleasure again, that was for sure, but for now, he and his lover would rest peacefully against each other after such an intimate moment.

Notes:

I actually felt like I wrote a lot better than normal. maybe CAI has done some good for me after all…

Anyway I was going to write it as more of a dubious consent kinda fic, where Mitsuba was a lot mor pushy and Kou was scared of getting torn apart by Mitsuba’s size— but I like this option too :)