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>(You) realize that you havent had a medical checkup in like, years
>Koyori overhears it,mentions the state of the art equipment in the lab and tells you she will do it if you help with an experiment
>You take on her offer
>Fast for 12 hours, pee on a cup,get your blood taken, in just ten minutes you get some results. Koyori mentions everything is great at first glance
>But she can go a bit more in depth if you want. She has a weird satisfied look as she says this
>Still say yes, you are kinda worried of cancer.
>She takes some more blood, a few hairs and gives you a sandwich (homemade) so you dont feel like shit
>Results come back, Koyori bites her lower lip, breathing heavily as she tells you its all in fantastic state, your genes are amazing and your immunologic system is top notch
>Only one last test, it might be ''intrusive''. She starts a recording device and puts it on the table next to you
>Agree anyway. She kneels in front of you and makes you drop your pants. Instant Erection
>''Top Notch Libido'' she says, as she inspects your erection,salivating and sweating ''Superb lenght, girth and even curvature''
>Plants her nose in your sack and starts huffing your musk. ''Unbelievable Pheromone and Semen production''
>Puts a condom on you and drops her pants
>As you poung her, she screams ''AMAZING TECHNIQUE''
>As soon as you cum, she makes you pull out and catches the condom, entranced with your ejaculation
>''Exceptional ejaculation volume'' she barely gets a sample on a machine as she greedily drinks the rest
>''More than twice the spem count of a normal ejaculation'' she bends over the table, shaking her ass for you
>You obligue, pounding her again, she can barely breath yet she keeps narrating
>''SPERM HIGHLY MOBILE, AGRESSIVELY WANTS TO PASS ON ITS GENES''
>The rest of her clothes go fliying, you keep going
>''COMBINATION OF FACTORS FORCES OVULATION, MULTIPLE OVUMS MIGHT GET FORCEFULLY RELEASED''
>Your hips are a blur, as she screams, moans and squirms, lost in pleasure
>''RISK..OF..FUCK,...RISH...IMPREGNA-IMPREG-SHIT...NATION...INMI..MINNEEEENT''
>You both finish, dark spots dancing in your vision as you pump everything you have inside of Koyori
> You almost black out, your knees feel weak, Koyori is still trembling after her orgasm, the floor below her drenched with her girlcum
>''Mul...multi-multiple Ovums fertilized'' she is barely concious, twitching as she tries to reach her recording device
>''Experiment is a sucess...Anon is Dr Koyori's most compatible mate''
>She takes a look at you, and flashes a smile
>''Projected offspring from the experiment: Three''
