Sora, a married woman who has been married for four years, has been unable to have children due to poor compatibility with her husband at night. Sora has a twisted sexual habit that she cannot tell her serious husband. That is, shite crosses the line with a strange man in a place that is not good for her... Sora suppressed her desires as a chaste wife, but from the day she witnessed a couple making their desires come true, Sora's rationality broke down. Then, on her way home from shopping, she spots a cute boy heading to the smoking area and follows him...