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Futa Summer Fling! An FGO Summer Fuck Fest!

Chapter 9: Part 5: Setting up the Siphons

Summary:

This chapter contains anal sex, cum inflation, and cunnilingus.

Notes:

(See the end of the chapter for notes.)

Chapter Text

Bradamante was proving a very eager student. Perhaps a bit to eager, as she kept bumbling into simple mistakes. She had genuinely impressed Medea when she managed to set up a mana siphoning charm within an hour, something the witch would never admit, but her own excitement caused her second one to begin making mistakes. Her second charm took nearly double the time the first.

“Annnnnnddddd… there!” She finished drawing a circle around a small, multicolored hairpin that resembled her usual shield. Light shone from the circle, almost blinding. When the pair could see clearly again, the circle was gone, but they could sense a bit of magical energy within the pin. “Perfect!”

“For a beginner.” Medea dismissed her.

Overnight the icy witch and her bubbly apprentice had fashioned quite a few magical accessories. Most were a simple black wristband, but Medea’s was a dark purple thigh strap and Bradamante had selected a hair pin. The idea was simple- a Servant would approach the magical energy dump they’d set up in front of the villa Master was staying in, and any excess mana they were carrying around would be remotely siphoned away via the charm. As they’d figured out with Mash the previous night, it also worked as a near instant intoxication cure.

It wasn’t quite so simple for Master, though. The magical energy in her system and the magical energy contained in her bloated beach ball of a womb were two separate sources. They would either need to find a way to mix the wells of mana together without accidentally poisoning her, or find a way to extract only the amount sloshing around inside her.

So they’d gotten creative.

Medea’s first thought was to induce a pseudo pregnancy so Master would “birth” the magical energy into a transferable form. The idea would work, but that meant subjecting the bloated woman to a lot of strain and effort at the end of every night. Lacking a way of removing that, the idea was discarded.

Bradamante had an idea of milking it out of her. If they could somehow move all that energy to Master’s tits, then they could just hook her up to a pump at night and drain it all out! Even if they could find a way to move it, the mana would still need to move out of the storage silo of Ritsuka’s belly.

They could use a Servant as a conduit, reversing the mana transfer into a person who could be siphoned from, but that would require someone to fuck Ritsuka again. The risk of someone shooting early and accidentally making the problem even worse was too high. An inanimate siphon could work, but since the mana remained unprocessed it would be unreasonably slow.

“Magic sure isn’t as easy as it looks…” Baradamante sighed as she sat down in a plush chair.

The witch nodded. “Indeed. This problem is a confounding one, even for me.” She glanced over at the next building over, where she could see Master sleeping peacefully through a window, pinned to her comfortable bedding by the sheer weight of the cum on her middle.

“I guess if it's got you stumped then I shouldn’t feel too bad. He talked about you guys, you know? Mages from the Age of the Gods who could do all these cool things…” Bradamante sank deeper into her chair. “If only Lord Merlin were here. He’d know what to do.”

Medea froze. That fluffy haired bastard would be just as helpless as they were in this situation, but…

“Come, Paladin. I believe you’ve found our solution.” Medea strode past her apprentice towards the door.

“Wha- I have?!”

“Correct. Merlin is our answer.”

——————

One thing was certain in the Mage of Flowers’ mind. Master had taste.

The Merlin of another world had set up shop halfway up the casino’s mountain in a small building with one, decently sized room. It wasn’t quite the Tower of Avalon, but it’d do. A few signs, some of signature flowers, a couple of mood lights, and of course a bed, and she had all she needed. Outpost of Avalon was born.

“Mm, splendid, splendid! Your tongue is undeniably skilled!”

“So warm… it’s like I’m being sucked in…”

The two latest guests at the outpost were Kiichi Hogen and Xuanzang Sanzang. The latter had been dragged there by the former, explicitly to “ease her new desires.” The poor monk had torn her revealing bottoms clean off with just a glimpse of the succubus’ peachy, stockings clad ass, her enormous erection pointed directly at those massive hills while throbbing with heavy need. It wasn’t long before the busty dickgirl was balls deep inside the mage’s tight asshole, taking her from behind so she couldn’t see her shame. If the boisterous teacher had picked up on that, she didn’t let it stop her from laying right in front of the stretched out succubi and demanding she be eaten out.

“You’re sure this is ok…?” Sanzang asked, wringing her hands. What was she supposed to do with them! Merlin was grinding those fat cheeks against her hips, occasionally bucking as to clap them together. Her hands definitely didn’t belong at her sides here, but touching the twerking temptress didn’t feel right either.

Merlin lifted her head from between the Assassin’s toned legs. “I’m a succubus, remember? I take on your desires as my own to purge you of them-”

“Did I say your task was complete?” Kiichi barked, pressing her back into her slick folds. “Ahaha, You truly are devoted to your teachings. I suppose I’ll have to teach you what desire is myself!” She let out a throaty groan as Merlin’s appendage began to plunder her slit once more. “Ghn, tell me, monk, what draws your eye?”

Sanzang considered for a moment, but only for a moment. It wasn’t hard to identify the object of her attention, especially when Merlin gave it a helpful twerk.

“Her butt?” The Caster flushed red.

“Yes, yes, what about it?”

“Well… the way it wobbles and shakes when she jumps. And how soft it is. And how much of it there is!” Sanzang’s usual cheer returned for a fleeting moment. “Plus she’s gripping my, uhm, thing hard. I can see why it’s so addicting.”

“Mm, well, why don’t you show her how much you’re enjoying it?” Kiichi proposed, gesturing her hands. “I’m sure she’d enjoy a little bit of physical appreciation!”

Mmhmm!” Came the white haired woman’s muffled reply. She grabbed a handful of her own extra large cake and gave it a firm squeeze. Unseen by her, Sanzang’s eyes were locked onto those slender digits and the fat that pushed up between them.

The monk’s hands quickly found themselves mauling Merlin’s wobble wagon of a behind, unable to get enough of that soft, pale flesh between her greedy fingers. The mage let loose and appreciative noise into the mentor’s cunt and redoubled her efforts to grind on the throbbing pole currently reshaping her intestines.

“Kanra kara kara! You’re a fast learner, monk! N-now, t-t haaahn!” The tengu groaned as Merlin struck another sweet spot. “Try to think of what comes, ffffuuu, naturally.”

Once again Merlin rose. “Give me your desires, virtuous monk Sanzang. All the sin you’ve bottled up over this summoning, pump it into my behind and free yourself from temptation!” The Lady of Avalon had plenty of experience with her types. They just needed the right excuse to step aside from their religious duties for a few moments, and they’d be more than willing to coat her insides a sticky, delicious white.

“Y-yeah… Yeah! That sounds great!” The Caster cheered, fully back to her cheery self. “Thanks Merlin! I just wish I had someone like you when I was alive!”

Hogen didn’t have to give any more instructions after that. Sanzang wasted no time in thrusting her hips like an animal in heat, sending her chest in a lurid bounce that the teacher couldn’t take her eyes off of.

PLAP PLAP PLAP PLAP

Every impact of the two’s hips sent Merlin’s pretty face deeper into the mentor’s flushed lips. Despite the fact that her behind was now a cushion for the lustful buddhist Merlin’s pussy eating skills weren’t affected in the slightest. In fact, she was somehow better! It felt her tongue somehow had lengthened, the deft pink thing was licking and probing every part of her canal that it could reach!

PLAP PLAP PLAP PLAP PLAP PLAP

“Haaah! Sex feels so good!” Sanzang cried, eyes locked onto the ocean of rippling meat she was plowing her new dick. Merlin’s ass must have been built for taking giant monk cock! There was no other way that she could be such a perfect hole for Sanzang to purge her desires in! “You don’t mind if I come back when I feel lust coming back right? Please?” She gave the succubus’ jiggling fuckmeat a needy squeeze. “A way to offload all my desires into such a perfect butt? This really must be a dream made true by the Grail! Please, Merlin? Let me fuck your ass more!” Sanzang didn’t even register that she’d sworn for the first time.

PLAP PLAP PLAP PLAP PLAP PLAP PLAP PLAP PLAP PLAP PLAP PLAP

Merlin was not in a state to respond. Sanzang’s thick pre was already starting to leak into her ass, giving the lust devil a small boost to truly dig into her fellow demon’s absolutely divine feminine juices. Getting her asshole plowed while eating pussy like she was a woman starved was the sort of thing she almost never got to do in her long, long life. And now, as long as this singularity was around, she could do it all the time!

Assuming her guests wanted it of course. Just today she’d finger blasted two AI girls into heaving messes of femspray (which tasted oddly floral), jerked off a pair of delinquents while an actual Saint painted her body white with semen, and used one of her favorite straps to peg a celt’s divine spirit fuck buddy while they made out. This may have been Master’s fantasy, but Merlin was having the time of her life!

PLAP PLAP PLAP PLAP

“C-close!” Sanzang warned. Her thrusts became erratic, her eyes unfocused, and her breaths steamed with lust. It was her first orgasm with a penis and the intensity was overwhelming! There was no going back, the virtuous monk Xuanzang Sanzang was already an anal addict, and the enormous cumshot brewing in her balls was evidence of her new ass obsessed outlook.

“Go on then! Cum, my student!” Kiichi egged her on, still holding Merlin between her legs. Watching her fellow spear open the succubus’ pucker was proving quite the show. “Fill her with your desire laced seed. Hold nothing back!”

PLAP PLAP PLAP PLAP

“N-naaaa haaaaaa!!!” The Caster cried out as she peaked, squeezing Merlin’s rump like it was her only lifeline to reality. The mage groaned as molten hot semen flew through her digestive tract backwards and quickly began to balloon out her stomach. Quite a meal indeed! She could feel the pent up lust of her gracious donated swimming inside her swelling belly, alongside a bit of guilt and relief. Mm, delicious…

Meanwhile Sanzang was hunched over Merlin’s back. How could anything feel this good? Her vision swam, she saw Hogen talking but couldn’t hear a word. The world was just her huge, cumming cock and the perfect ass she was using to dump her sperm into. “Haaaaaaaahnnnnnn…”

For over a minute they stayed like that, Sanzang blasting thick ropes of batter into Merlin’s welcoming passage while the mage made lewd, exaggerated moans against the teacher’s pussy. Finally the monk had enough, falling backwards and breathing heavily as a final, weak string of cum shot out of her tip and glazed the succubi’s perky behind. Though Sanzang was done, her cock clearly wasn’t, still standing tall and throbbing as if upset to be separated from the incredible hole it had been forced from.

That was the scene Medea and Bradamante walked in on.

“O-oh, sorry!” The Paladin blushed and looked away, as if anyone really cared. “We’ll come back-”

“Merlin. Master is in need of your assistance.” Medea cut her off and stepped forwards. “Can we trouble you to leave this and assist her?”

After a few moments, the woman rose. “Can you at least wait until I’m done eating out?” She sighed, knowing full well the answer.

“No. Master takes priority.” The witch crossed her arms. She glanced down at the still struck-dumb monk and her still unfailing erection. “Madam Hogen, could you make do while we are busy with her?”

Kiichi gave her trademark laugh. “Kanra kara kara! I’ll be fine, go help Master. But be ready for a lot semen stains in your sheets, semen demon!”

With a small pout on her cute face, Merlin summoned her frilly swimsuit into being and stood. Thick globs of buddhist semen still dropped onto the floor with loud splurchs, she was making no effort to hide the fact that she just finished up. “I suppose there’s no keeping Master waiting. Let us hurry, I don’t want to be away long and miss another session.”

The three began to leave. “Oh! The siphons!” Bradamante quickly turned back to the remaining couple. The Assassin was poised to stretch her unsatisfied cunt wide on the recovering woman’s staff. “Put these on and swing by Master’s later! I’ll explain everything!” She threw them two of the wristbands she’d made earlier and followed after her new teacher and the female version of her old one.

As they left, they heard Sanzang’s loud, pleasured moans alongside Kiichi’s loud encouragements. Merlin suppressed her jealousy.

——————

Merlin blinked at the sight before her. Ritsuka’s increased curves had been one thing, but the sheer amount of cum she was carrying…!

“We need you to safely extract the mana inside her, without getting her cum drunk. Or worse.” Bradamante explained. “Since you’re a succubus and a version of Lord Merlin, we figured you could help!”

“Half succubus.” She corrected, watching the surface of Ritsuka’s bloated middle intently. “So… you don’t mind what I do with the semen once I extract the mana from it, right?”

The apprentice glanced at the witch for hell, and was met with a passive shrug. “Not really?”

“Excellent. I’ll have Master drained and ready for you by morning. I’ll make sure all of this magical energy gets dumped too.” She smiled, tapping her staff on the floor a few times. “I’ll make sure I start siphoning during my day activities as well. It’s not like I’m using the energy for spells right now.”

“Thank you. Good night, Mage of Flowers.” Medea turned to leave.

“What do you use the semen for?” Bradamante blurted out, curious. The hoodie clad Assassin felt a pang of remorse for her poor student before she quickly made herself scarce.

“I’m glad you asked!” Merlin stripped once again and knelt next to their Master’s leaking lower holes. “For succubi, semen is our everything. It helps channel magic, sustains us, keeps us young, it’s an excellent skin care agent, and helps us know what you humans feel! This is because sperm, as a source of life…”

Baramante zoned out, not that Merlin noticed. How exactly she managed to fix their problem went far over her head, but by sunrise Master’s stomach was back to its usual flat, lightly toned state and the magical energy was safely stored into the dump: a statue of Circe atop her largest piglet, surrounded by her smaller ones, her hands outstretched.

Notes:

She’s Merlin to me. Lady Avalon just doesn’t feel right.

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