Ever since the day she crossed the line with her son Yoshio, Kaori has lived a life of two faces. In front of her husband, she is the same good wife as before. When her husband leaves, she becomes a lewd woman who indulges in her son's carnal desires. She knows this is wrong... But her body is so immersed in her relationship with her son that there is no turning back. And today, while playing the role of a good wife, Kaori thinks about her affair with her son, her crotch gets wet, and she waits for the moment when her husband leaves.