>>22248645"Koyori, are you sure about this? This isn't dangerous is it?"
"Assistant-kun, who's the expert here?" She looks over her shoulder and raises an eyebrow. "Now come on, this is embarrassing..."
The coyote's butt faces you as she she's on all fours on the examination table, her fluffy tail high up in the air with her panties lowered about halfway down her hips - covering her nether lips but fully exposing her puffy, pink and twitching asshole. It's not your first rodeo with her, so nothing you haven't seen before, but this situation makes things a lot more exciting and a tiny bit weird.
"Okay, here it goes then..."
The tips of your middle and ring fingers dip into the glass container she had excitedly handed to you minutes earlier, when by the time you had regained your senses from the sickeningly sweet strawberry smell emanating from it, Koyori was already skirtless and halfway up the table. She faces away once again and pushes up her butt even closer to you as you bring your digits up towards it and finally, your goo-coated skin makes contact with the soft folds of her anus - immediately making her jump in surprise with a squeal.
"Eek!"
"W-what's wrong?" You back off as all her pores stand on up.
"Notes for next time, make sure to warm it up prior to application." Koyori taps her lip with the tip of her finger, ignoring you and just presenting her ass once again. "Okay, hurry!" She turns to you once again with a glint in her eye.
You sigh. "At least it's just cold, and nothing else, huh," you think to yourself just as you press against her skin once again. Your fingers circle her entrance, stretching her folds and gently massaging the concoction into her pores. Koyori's tail twitches from your touch and short sighs and whispers leave her lips, but she endures your initial ministrations surprisingly well. Finally, having followed her earlier instructions, your fingers firm up and you push them in - parting her outer fleshy ring to prod at the ring of muscle that sits behind it and keeps you out. But after a few solid thrusts, she finally relaxes enough to allow you entrance into her rectum with a long, high-pitched sigh.
"Okay - I'll lather it inside like you asked." Your eyes focus on how her cute hole hugs your fingers, feeling your pants grow tighter and tighter as your erection stiffens. It's tight at the entrance but so soft and smooth on the inside, the slick texture of her innards pleasurable to play with and stretch as you mingle work and pleasure by sodomizing your cute girlfriend/boss. Soon enough the gel on your fingers is all but gone and safely deposited in her intestinal lining. "Okay - I'll grab some mo-"
All of a sudden, Koyori's body tenses up - hard. Hard enough that all the muscles on her back constrict at the same time and her tail shoots straight upwards along with her ears, her shoulders trembling as she struggles to keep her weight up. Her ass too tightens around the base of your fingers, enough to be painful, and you look up with concern. "H-hey, are you okay?!"
Koyori turns her face sideways towards you, and her expression has all but melted - her eyes are only open halfway and seem to look through you, as opposed to at you. Her mouth is agape, her tongue is out as her breaths are so heavy and hot that condensate forms outside her lips, with drool cascadinng down her chin and onto the table.
"K-koyo?!" You stand up and extract your fingers from her insides, pulling them out quickly in your desperation to lend her a hand. As they exit her hole with a pop, though, her body stiffens up like a stone and you see her eyes roll up into her skull, followed by a high-pitched shriek from her lips
"EEEEK!" Her hips shoot upward just as her upper body collapses onto the thin mattress and a moment later, a spray of clear fluids explodes from her vagina, shooting through her panties to drench your labcoat and pants in her female ejaculate as her body is rocked by a powerful, mind-shattering orgasm. "Oooohhh... Aaaaaaahh..." Her tail wags from side to side in between powerful contractions, straightening out again once her body pushes out more and more fluids as her abdomen tightens up so much it looks as if it's cramping. Her otherwise pretty butthole gapes wide, as if desperately inviting your digits back inside, winking lewdly once she begins to calm down. "Goeeeh..."
You stand there, stunned and with droplets and streaks of Koyori's juices splattered everywhere, unsure exactly of what you just did, or rather what she made you do. By now your dick is fully standing at attention as you take in the scene in front of you. You swallow hard, taking another look at the vial in our other hand.
You hear the scientist attempt to formulate a sentence, but her speech is so slurred that all you can make out is: "More... more..."
You dip your fingers in the goo once again, holding Koyori by the hips.
"Okay. Here goes..."
