Misono lives with her mother. To help out with the family finances, she decides to work as a home helper for her landlord, who is wheelchair-bound. However, the landlord takes advantage of her plea, saying, "I'll do anything, just let me work," and makes her help him with his sexual needs. His demands escalate, and one day he forces her to have sex with him and cum inside her. At first she resists, but little by little she learns the joys of being a woman and becomes addicted to the pleasures of sex...