Nagasawa Misaki begins her first day as an English teacher at the prestigious Toukoku Preparatory School, only to find herself in a hostile and hyper-sexualized environment. After receiving warnings about the students' nature, she is lured into a secluded room by a student who forces himself upon her. Misaki's horror deepens when she discovers that the school's depravity extends to her own colleagues, marking a traumatic start to her teaching career.
Determined to move past her trauma, Ayako begins a unique relationship with her student, Nitoh, inviting him to her home for private tutoring. After a consensual intimate encounter, Ayako discovers that sexual guidance can significantly motivate Nitoh's academic success. Embracing a controversial philosophy of "body lessons," she commits herself to steering her students toward maturity and excellence through both mental and physical instruction.