Mikako had to move into her husband's parents' house after the apartment she lived in leaked. She thought she would be able to get along well with her stepfather, Zenji, who she didn't really get along with... But Zenji, who discovered her weakness through an unexpected turn of events, continues to play with her. However, he repeatedly humiliates her body, teasing her by bringing her to the brink, never letting her climax when she is just one step away from it. Mikako's body, which has been tormented to the brink of orgasm, is so intense that she is about to go crazy, but she can no longer contain her excitement...