After losing the punishment game, I ended up going out with Kashiwagi-san, the most nerdy girl in my class... She's much more proactive and curious about sex than you'd imagine from her appearance. I was invited to have sex with Kashiwagi-san. The next day, Kashiwagi-san showed up at school, her appearance and desires completely transformed into a nymphomaniac! Her urge for sex escalates as she seeks excitement and unleashes her hidden sexual desire, devouring one dick after another!