Nanoka, a student in the life sciences department, is a serious and research-oriented science girl. She is pure and incredibly beautiful.
After the usual lecture, she stops me. She says she wants to continue the experiment... or something like that.
I followed her sudden invitation into an empty classroom.
I thought it was just a continuation of the previous experiment... but as she touched my hands and arms to check my reactions, she reached for my cock before I knew it.
"I wonder what kind of reaction you'll show."
She gave me a handjob while playing with my crotch, naturally stripped off my pants, and even gave me a blowjob...
I thought she had absolutely no interest in erotic things.
But it seems I was wrong.
From that day on, our secret experiments for just the two of us began.
Bound and with my privates exposed, I was left at her mercy—sucked, licked, and fucked... She used aphrodisiacs to get more stimulating reactions while fucking me... Over and over again, I was made to cum as part of her "experiments." Through her, I tasted new experiences, and my sexual fetishes gradually began to change...
