Nana, a wife who has a secret that she cannot tell her husband. - That is, he had a forbidden relationship with his son-in-law Jun. - Nana is confused by Jun who is gradually becoming bolder... Even though she has a husband, she starts asking for him... She is worried that if things continue like this, her husband will find out about their relationship, but she refuses Jun's feelings and caresses. - I end up continuing the relationship without being able to do anything. - And Nana's excitement that her husband might find out makes her even more excited, and she tastes climax over and over again...