You get down and dirty with the teacher

"5 minutes 55 seconds." You say, conjuring an ice spike, your mouth now dried as you siphoned the last of the moisture in the air to cast the spell. You could just shift the ice you already used into new spells, but you knew the specifications of those already. It would just be cheating at that point.

"Wow, you learn faster than human mages. Average cast time for day one is 30 minutes." Citrinas complimented as you clicked your tongue.

"What's the average casting time of a professional mage?" You ask, summoning a chair of ice behind you with instinctive magic and taking a seat.

"About 3 minutes is the average for a professional." Citrinas answered as you braced yourself.

"... What's your time?" You ask cautiously.

"Depends on the element. Ice the most complex and troublesome elements, so it's about 46 seconds." She answers as you wince. Ice was the worst magic? But...

"... Please tell me you're kidding about ice being overly complex." You ask, nearly crying at just how shit your build was. Your true form was too big to do any fancy movements to dodge attacks, your human form was 6 times weaker to ice and fire than a normal human, holy magic caused you agonizing pain in both forms, your tiny human body was too little to be a warrior, and the only magic you could use as a human was ice magic thanks to your elemental infusion.

"Wind, fire, or earth are easier. Air's just a matter of compressing air in an area, fire's just vibrating atoms until they combust, and earth is moving the soil around, so calculations are easier. You should try learning them instead." Citrinas said as you feel her verbally kick you in the nads. Splendid. Everyday, you find out your body is even worse than you realize.

"...I can't use anything but ice magic in this form." You mumble as Citrinas freezes in place.

"Eh?"

"Elemental infusion's the only reason I can use magic like this." You say as she bites her lip, realizing how useless you were in a fight. You can see the pity in her eyes as she forces a smile and pats you on the shoulder.

"... We'll deal with that later. For now, we should head out." She says as you sit up and grab her shoulder.

"Hold on. I wanna stay here a bit longer." You say, almost forgetting one pressing matter. You tried to ignore it until now, but you needed to do it.

"Why?" She asks as you swallow. You were ashamed to ask this, but this place was literally the one place you could do this.

"I think I earned a few hours of me time for being good in the guild and taking class." You say coyly as Citrinas sighs, not understanding what you meant by "me time".

"Fine, but I want you to be in my sight." She says as you grind your teeth.

"It's not like I can get into trouble in a pocket dimension." You whine as she shakes her head.

"I left you alone for one night. I'm not doing that again." She says, still annoyed at your first night in Kolderia. "Just pretend I'm not here." She says as you scowl at her.

"Fine." You say while gathering the moisture in the area for one more spell. You use instinctive magic, shaping the ice by your mental image as a sculpture slowly takes shape. You give it slender legs and thin hips that contrasted with the massive, bountiful breasts on top. It had long, shoulder length hair and a young face of a girl in her early 20s. Its pose is on the ground, spread eagle and masturbating itself as you lower your pants and let your cocks flop out, hardening at the visual stimulation. Suddenly, your masturbation material is vaporized by a fireball as Citrinas walks over and grabs you by the shoulders to shake you around, your cocks slapping her thighs as she shakes you violently.

"What are you doing!?" Citrinas asks as you look back at the ice sculpture you had painstakingly crafted, the ahegao face it had rolling towards you as it slowly melted into the ground. You're quite proud you managed to recreate Citrinas' face so easily, but having the actual model there did help.

"Making something to rub one out to." You answer as she shakes you even harder.

"You are BANNED from making nude statues of me!" She orders as you scoff at her, both your cocks at half mast as they slam into her gut, forcing her to release you as you cross your arms.

"You can watch, or you can leave me alone for an hour. I need this dammit!" You declare before stopping and looking down at your cocks again. A thought passes through your mind as you realize something. "... How do I rub one out with these things?" You ask to yourself, looking down at your cocks, two weeks of chastity causing them to change quite a bit. For one, you'd grown a few inches in length, both of them now a clean 2 feet while the girth could best be described as comically oversized on your tiny body. Your balls had grown in equal measure, now the size of oranges and tingling at the prospect of draining themselves. You see thick sludge already oozing from your cock, the viscosity of your precum alone thicker than your normal loads. It seems your human form didn't take kindly to abstinence. As you ignore Citrinas and try to rub one out, you realize the impossibility of the task due to your odd body.

The equine shape lowered the sensitivity of anything behind your medial ring, while the spikes and the tentacles made rubbing nigh impossible for you. Plus, the sheer size of the thing compared to your body made self pleasure nigh impossible. Even with two hands, you couldn't wrap around even one of your cocks, let alone both of them. While you would have been happy to have been hung like a demonic horse in the past, now that you got your wish you missed having a normal human sized cock.

"Th-they look bigger than usual." Citrinas says, rubbing her legs together as you try to think of a way to rub one out. You were a **** monster, but you also knew abruptly grabbing Citrinas and pinning her down would just end with you deep fried by a fire spell.

"That's what happens when you lock me in a tight wooden carriage with 5 women and zero time to relieve myself." You snap at her. "Again, I am a tentacle monster woman! Do you have any idea how hard it is to stay abstinent for two weeks?" You ask as she sighs. Without warning, she starts stripping down in front of you, completely unashamed as she stands stark naked in front of you. You see her pink nipples perk up as her crotch begins oozing, sensing your aroused manhood and readying itself for another lovemaking session. Considering you didn't use any of your mindbreak skills or do anything but normal sex, you're almost proud at how well her body was trained.

"Well, past two days you did your best to blend in, so you do deserve a reward. Just try not to modify me too-" She says, only for her words to be cut off by a black miasma surrounding your body. Your vision goes away, only to return a half second later as you feel your true form billow forth from the black miasma. Your roots plant themselves in the soil, drawing nutrients up as your fleshy plant tendrils writhe and twitch with zeal, overjoyed to return to the world and breed once more. You snatch Citrinas up and lift her up, supporting her body by her waist and thighs as you prepare to give her two weeks' worth of pent up lust.

"Someone's excited." She notes as you send a tentacle to her crotch. Rather than penetrate her, you gently prod her and withdraw it, displaying a long thread of grool attached to it.

"You're right. Someone is excited." You mock as Citrinas looks away, blushing as her pussy drools even more. It seems she preferred your monster form over your human form. You're unsure if this was because she just didn't like human partners, or if she preferred rougher sex. Either way, you decide to toy around with her for a bit.

"Wow, look how loose you are." You joke while looking at her gaping pussy.

"I'm not loose!" She snaps back quickly, not realizing that it really didn't matter how tight or loose she was when partnered with you. Unless she somehow became the size of a mountain, you were quite sure you could fill her to the brim. That said, you decide to mess with her some more as you use instinctive magic to form an ice mirror in front of Citrinas. Spreading her legs apart, you hold her head and **** her to look at her own reflection.

"I haven't even stuffed anything into you, and you're already stretched wide open and drooling." You say, bullying Citrinas as she tries to look away from her reflection, only to find another mirror next to her, reflecting her nude body for her to see. You weren't lying about how loose she was either, her once virgin hole now gaping open loose enough that a less endowed man wouldn't even touch her vaginal walls. At your words, you can see her arousal spike, her clit twitching as it pulsed upwards, the nub now a few centimeters in length and throbbing in the air. "Wow, look at your clit. It looks like it's growing. Maybe if we keep at it, you'll get to keep your cock permanently." You say, sending a few tentacles over and jerking off her oversized clit, reminding her of the pleasures she felt as a futa. It seems there was a minor lingering effect of your potions.

"H-hey! Don't insult my body like that!" She shouts, struggling in your grasp as you send a pair of sucker tentacles and latch onto her breasts. You begin licking at her nipples, half expecting milk to surge forth as you begin teasing her pussy with thin, pencil thick tentacles. Rather than stretch her, you focus on stimulating her most sensitive spots, the sensation only serving to rile the two of you up even more.

"I'm not insulting you, I prefer you like this, considering I'm the one who did it." You say, holding up an array of injector tentacles in front of her face. "Come on, you know you want to go all the way." You offer as she gives a token resistance to your offer, looking away as you feel her struggles weaken. When she didn't realize you were sentient, she was even more perverse than you ever were. The only reason she was hesitating now was shame, knowing you were a sentient partner than a glorified meat dildo.

"I need to blend in with everyone. Don't go to far with your fun." She says, as you cheerily jab her clit and breasts, filling both with potions as you retract all other tentacles. You hold her up and **** her to watch as her already massive clit swells in size, growing a thick foreskin and a mushroom head. She squirms in your grasp as her breasts begin to fill, white dribbles of milk appearing at her pink nipples as she has a violent orgasm at her transformation. As her orgasm winds down, you see that she has a brand new 4 inch cock jutting out between her pussy lips, the tiny size matching her build far better than the 2 foot long behemoth she once had attached to her. You're tempted to continue injecting her, but any bigger and she would be incapable of hiding it under her clothes.

Before she can gain her bearings, you send over a swarm of slimy tongue tendrils, wrapping around every inch over her body as you lick her. You send several into her pussy and ass while forcing one into her mouth, french kissing her as you gently rub her body. You even have one tentacle wrap around her cock, jerking her off as her milk sprays out, drenching your tongues with sweet nectar. You feel her twitch and orgasm again and again from your barrage, the full body **** sapping her mind of cognizance as she begins thrusting her hips forward, intent on feeling the bliss of a male orgasm. Throughout all of this, you haven't come once, too busy enjoying yourself on bullying her to vent your frustration. As you unravel your tongues, you see Citrinas' body glisten from your saliva, her cock twitching as both her breasts weakly spurt milk. You then send an array of cocks in front of her, each one throbbing with anticipation as you wrap one tentacle around her chest to play with.

"Since you were nice enough to let me do this, I'll let you choose which one I use on you." You say, holding up every possibly conceivable tentacle you could think of. She drools at the sight, only for shame to hit her as she tries to resist her more carnal urges. You left a flared horse cock studded with spikes and smaller tentacles right in front of her, the shape identical to the one your human form retained. Next to it is a forest of normal, human cocks of varying thickness that paled in comparison to the oversized beast next to them. You see her bite her lip, only to shut her eyes and look away.

"Just choose whichever you want. I'm doing this to help you." She says, unable to overcome her shame or deny her desires as you ready yourself.

"Great. We'll use all of them." You say, stuffing one of the human cocks into Citrinas' throat while shoving the oversized horse cock into her pussy. You send 3 of your humanoid cocks into her ass while the rest coil around her chest. You send one sucker tendril to her cock, jerking her off while latching two more suckers onto her chest to begin sucking her milk away. You even send two cocks to her hands, letting her jerk them off to keep her from losing focus. The once overwhelming sensations are now familiar to you as you hit Citrinas' every weakpoint, months of practice giving you an insight into her body that even she was ignorant of. You suddenly feel her licking away at the cock in her mouth, her switch now flipped as you feel her giving rougher handjobs to both tendrils in her hands. You feel your orgasm come as you feel Citrinas' body tense up, ready to give an orgasm of her own.

You withdraw the cocks in her mouth and ass while leaving the tentacle in her pussy as you begin firing thick ooze in every which direction. As usual, Citrinas' belly swells up, her womb packed with sperm while the rest of her body is covered in your genetic payload. As your first volley sprays out, you can't help but be shocked at how thick it is compared to your usual cumshots, sticking to her in massive clumps as you feel Citrinas struggle in your grip, thrusting her hips forward to stimulate her own clit-dick. Her stomach continues growing in size, yet it doesn't diminish in the slightest as you realize the issue. Your cum was too thick for her to shoot.

"Hey Citrinas, if you make your cock a little bigger, you might be able to come." You say, tauntingly waving an injector tentacle in front of her lust driven face while freeing one of her arms up. Before you can say another word, she grabs the injector and jabs it into herself, her clit-dick doubling in size as you withdraw the sucker tendril and begin jerking her off, letting her see the 8 inch cock spewing gallons of sperm. You feel her squirm as the two of you spend the next 10 minutes ejaculating, your cumshot serving as momentum for Citrinas to empty her own load. By the time Citrinas' stomach has returned to its normal flat size, most of the area is drenched in your sexual fluids.

"Is that it?" Citrinas asks, likely forgetting about your stamina.

"I've got two weeks to catch up on. You might want to get ready." You warn as you ready yourself for round two. Hours go by as you use different cocks on Citrinas, stretching her even more as you find new ways to make her cum. You lose track of time, but you're quite sure that you've fucked her for at least 3 hours straight.

By the time you decide you're content, your sperm has pooled up around the entire area in an ankle height sludge. Citrinas herself is a drooling, moaning mess covered in slime, barely cognizant of the time or where she was. You decide to reactivate your humanity spell, conjuring blinding light in the area as you compact your body back into a human. You hear Citrinas groan as she feels the cocks still in her body grow in girth, your human form's cocks slightly girthier than the ones you used on her. Soon, she's lying face down in a downward facing dog position with you situated behind her, both your cocks stuffed into her holes. Most notably, however, was the fact that you suddenly felt pent up again. In fact, it felt like you never came once.

"Oh... Sorry Citrinas." You say, learning a new fact about your body, your balls tingling as you feel them swell ever so slightly, sensing a woman to deposit their payload into.

"Whuh?" She asks, unable to enunciate from the mind shattering sex.

"I think my human form and monster form both need to be emptied." You apologize as you begin thrusting, her body stiffening at the realization. She was only half done relieving you. As an apology, you at least flip her onto her back and jerk her cock off to help empty her belly while you spend the next few hours fucking her. By the time you're finally relieved, the thick sperm polluting her domain stretches almost half of the area. Picking up the arch-imago, you carry her into the estate and rinse the sperm off both of you before changing her into her pajamas and tucking her into bed.