Ai, a beautiful wife who lives a happy life with her kind husband, Kosuke, promised to have a baby when she returned from a business trip and was looking forward to her husband's return. One day, Yuji, her ex-boyfriend, shows up at her house while her husband is away, and because of a past accident, he threatens her and rapes her. A chastity belt was attached to her while she was in a dazed state at the climax. Yuuji, who knows that her girlfriend Aika has a strong sexual desire, forces her to abstain, and she can't tell her husband when she returns, and her sexual desire reaches its limit. Unable to bear her throbbing uterus, she accepted the worst man's cock in front of her husband and impregnated her...