After her father disappeared and her debts and rent fell behind, Kokoro, a daughter, begs her landlord to help her in place of her mother, who has become ill after working too hard. The landlord, who is wheelchair-bound, takes advantage of Kokoro's pleas, saying "I'll do anything," and repeatedly commits sexual harassment. At first, he only offers to care for her, but his demands escalate, and he finally ends up having sex with her and ejaculating inside her. Kokoro resists at first, but gradually becomes his sex slave.