HBAD-253 A pure and earnest new female teacher falls into the trap of an older teacher and is violated one after another, awakening to the pleasure of the nude class.

Sakura, a newly appointed teacher, is well-liked by both the teachers and students for her quiet and serious personality, but one day she is suddenly raped by the students and is threatened with a video of the rape. Sakura decides to confess this to the principal, but the person who shows up is a normally plain, older female teacher. Sakura realizes that it's all a trap set by her and finds herself falling into even more deception.