One day, Kasumi, a new teacher, visits the home of a student named Manabu who refuses to come to school in her class. The school had given up on Manabu after he had previously caused problems at school, but he overcame the objections of his fellow teachers and made a home visit. However, as soon as Manabu welcomed Kasumi, he gave her tea laced with a substance that has a coma-inducing effect and pinned her down. In the middle of the act, her father, a yakuza named Takeru, and his thug subordinate appeared and gang-raped Kasumi...