Reiko Nakamori is a devoted education-focused mother determined to get her son into a top university. When her son's test scores drop, she vents her frustration at his private tutor, only to become the target of his retaliation through violent rape. The school's homeroom teacher and vice-teacher, desperate to improve the boy's poor academic performance, begin pressuring Reiko into submitting to one degrading sexual act after another. Her voluptuous body becomes prey for the insatiable desires of these education professionals. As her pride and sense of duty as a strict mother gradually twist and break down, Reiko is consumed by deeper domination and overwhelming pleasure.