Beneath her skirt, between her firm, fleshy thighs, there’s a secret hidden…. Perfect and cold-blooded Itsuki Hirahara sits in class, and while insecure teacher Yohito Osumi teaches a lesson at the blackboard, she spreads her legs to show him what she’s got there… Itsuki, who lost her virginity unexpectedly, forces Yohito to become her lover by threatening to reveal what happened to his parents. Since then, he continues to play the role of …