Beneath her skirt, between her firm, fleshy thighs, lies a secret… Itsuki Hirahara, perfect and ruthless, sits in class, and while the insecure teacher Yohito Osumi lectures at the blackboard, she spreads her legs to show him what she's got… Itsuki, who unexpectedly lost her virginity, forces Yohito to become her lover by threatening to reveal what happened to his parents. Since then, she continues to play the role of…