Aya is not related to her husband by blood. She had no sex with her husband, but she still lived a happy life. One day, Aya notices that her own breasts are bigger than before. At the same time she is, she is unusual up to the heat and sensibility of her chest. Aya who is treated lightly by her husband and can't handle her hot breast. Meanwhile, her husband has decided to go on a business trip, and it is decided that she will live alone with her son-in-law.
