[Reducing Mosaic]JRBA-002 I learned the joy of making a guy cum by violating nipples during my teenage years' sexual rampage. The sex growth diary of Sumire-chan, the pure sadist student council president.

"Do men also feel good when their nipples are played with?" Student council president Sumire-chan, having met a perverted old man on SNS, goes to a love hotel after school for lewd study sessions. Watching the old man moan and feel pleasure from his nipples, Sumire-chan becomes hooked on nipple torture. "Does it feel good when you pinch them? What about biting? Being licked is insane, right?" After tormenting his nipples and making him reach climax, she discovers the joy of having her vagina penetrated by his erect penis. Her teenage sexual desires spiral out of control.