On all fours, face buried in a pillow, ass in the air [Enhanced M]

You let out a shuddering breath as you flick between Naomi's dark, fiery eyes and her pussy, swaying in the air. You've never seen such a beautiful creature before, let alone one offering herself to you like this. Her smooth back, the complexion of cocoa, arches to raise her butt, whilst pressing her face and tits into a soft pillow. Her legs are spread wide, exposing her arsehole and cunt to you. You see a pale fluid dribbling out of the latter hole.

Telling yourself to breathe, you slowly crawl towards her. This is what you always wanted: finally, you're getting to reap the fruits of your work, and fuck an Enhanced female - and a particularly sexy one at that. As you line up your huge, Enhanced cock with her tight slit, you feel it twitching in anticipation.

Naomi wiggles her ass impatiently. "Come on Felix, fuck me already with that big dick!"

You take a deep breath, and plunge in.

"Nnnnngh!" You grit your teeth as you feel your head pushing into her flesh - she's a lot tighter than you expected. Or maybe you're a lot bigger than you realised...

"Yesss, yes, go deeper," gasps Naomi. "Keep - ah! - stretching me out..."

With a final grunt, you pull yourself all the way to the hilt, causing Naomi to let out a long, low moan. She feels incredible - tight, but not painfully so, like her vagina was made to take your cock. As you pull back for another thrust, you see your roommate already clutching her pillow with all her strength. For several minutes, you gradually increase the tempo, until you're pounding her Brazilian pussy like the slut you know she is. Her ass jiggles every time your muscular body slams into it, her legs shaking as she grows weak under your battery. She moans into the pillow, louder and louder, until she finally erupts in a scream. Her pussy oscillates around your thick, hard cock, doing its best to milk it; it takes everything you have, but you hold back from cumming inside her. Instead, you give her a few more thrusts, steadily slowing, as her body shudders and her legs collapse when you pull out.

As her orgasm slowly begins to subside, she rolls over to face you, her voice catching as she speaks. "It was - hhh! - even better than I thought..."

You look up, to see Ariadne watching you closely, one hand plunging a dildo even bigger than your cock into and out of her dripping vagina. "You have a lot of power," she comments. "Let me see how you use it on one of the other girls."

Your dick is already complaining at its lack of a sheath, so you look around for a new one. You see a cute girl with dyed-pink hair taking off her strap-on, her partner lying spent on the ground. Striding up to the pink-haired girl, you take her waist in your hands and slam your engorged cock into her tight pussy. She moans loudly, her back arching against you, as you fill her up completely. When you begin a steady rhythm of thrusts, she purrs erotically and reaches back to stroke your jaw.

"Yes yes yes," she mutters, then says, "I'm Aria - you're Felix Samson, aren't you?"

You grunt an affirmative, not letting up your pace as you spare a hand to squeeze her perky breasts.

"Then this hot little body - AHHH! - belongs to you... Do whatever - NNGH! - you want to me... Fuck my tight pussy with your giant cock..."

You give her what she wants, and give into your raging lust. You pound her with all your strength, her petite body shaking like a rag doll under your grip. It doesn't take long before she cums, her pussy clenching unbearably hard around your cock as she yells incoherently, eyes rolling back into her head.

"I'm gonna cum," you gasp - even with your heightened stamina, it's unavoidable. It's only because of her gushing juices lubricating you, that you are physically able to pull out of her.

"Cum... on me," whispers Aria, still in the midst of her orgasm. "Mark me as yours..."

You spurt all over her lithe little body, painting white her breasts, stomach, arms, face, as she lolls on the soft floor. Ropes and ropes come out, but when it's finally over, you take in her sprawled body with satisfaction. Her pretty face is coated in your seed, pink hair plastered over her mouth by your cum.

Suddenly, out of the corner of your eye you see something throw itself towards you, and you gasp as your still-hard dick is abruptly encased in something warm, soft, and wet. You look down, uncomprehending, and see a pair of big, lightning-blue eyes staring back at you adoringly.

"I... don't think you're meant to be giving blowjobs," you smile uncertainly. The young woman pulls herself off your head with a 'pop', and smiles up at you.

"Well, I can't let a nice big dick like yours get soft, now, can I?" she smiles naughtily. "Besides, I asked Miss Ariadne, and she said face-fucking counts as penetration. So..." She jams her mouth back over your cock. "Fhhhh Mhhhh," she says, her words muffled by the thick shaft in her mouth.

You blink a couple of times. You always knew your work on Enhanced would get you more than just money, but this exceeds your wildest expectations. Grinning a little wildly, you bury your fingers in the girl's thick, raven-black hair, and thrust right into her mouth. You can see how much she strains to accommodate your girth from the way her eyes water - but they look up at you with adoration and exhilaration. You slowly push further, until finally your balls are resting on her pointed chin. She gags a couple of times, practically **** as you push against her throat, but manages to overcome her reflexes to hold you fully in her mouth. But you weren't told to be gentle. You were told you have to face-fuck her.

You pound into her, barely able to hold yourself back from going all out and dislocating her jaw. The girl loses herself in the sensation of you fucking her mouth, her eyes drifting upwards until only a sliver of blue is visible, her mouth desperately, instinctively sucking as your cock slams in and out of it. Her body shudders as she orgasms, practically ****, and you switch to another girl, this one with skin as dark as ebony. She willingly lets you fuck her face with equal ferocity, eager to be used like the student before her.

You fuck your way through the rest of the lesson, for the first time discovering the true potential of your increased stamina and libido thanks to Enhanced M. You're pretty sure you fuck your way through all 21 girls in the class - the only exception is Ariadne, who doesn't seem inclined to join her pupils, merely stimulating herself with her toys. After you cum for a few more times, you still have no trouble remaining hard, and find you can fuck to your heart's content whilst easily holding back from your next orgasm. Several more of the girls promise to always be available for you, as repayment for Enhanced F. However, Naomi is definitely the standout from the class, her sexy Brazilian body outshining even this high calibre of girls, her passion for you unparalleled.

• Naomi +5%

By the time the lesson is up, even you have reached the limit of your endurance, and the rest of the class is lying indisposed in various states, most of the girls' bodies coated in cum, drained by over two hours of sex.

"Not bad," comments your teacher, causing you to stir from your comfy rest. "Your stamina is, as a class, slightly above average for new entrants - but we'll soon expand your horizons far beyond just a couple of hours. As for your technique - driven by lust, which is good, but you lack any real skill. Mr Samson - I'd like to give you a special mention, however: you show incredible strength, and you clearly have the raw power to become one of the best graduates this class has ever seen. Over the coming weeks we'll both look into less aggressive forms of penetration, and explore more dynamic positions to allow you to maintain interest even in long-term relationships."

Wearily, your class tramps into the showers, where you wash the sweat off yourself, and the girls make the floor slick from their juices and your cum. You re-dress, the garments feeling rough and uncomfortable compared to the smooth skin you've been touching for hours, and make your way back out into the beautiful valley.