Incest mother-child favoritism

Kayoko, a wife, lives a happy life with her son Yu, a university student, and her husband Takehiko, an office worker. One day, after being demoted, her once kind husband completely changed. Days when he gets addicted to alcohol and assaults Kayoko. Even at night, Kayoko was treated like a comfort woman. However, Kayoko believes that her ex-husband will return to her and does her best without complaining. Yu begins to be conscious of women after seeing such a healthy mother, Kayoko...