Haruka (Seto) is saddened by the loss of her husband, and because of her loneliness, she commits the taboo of incest. During the days spent without cutting off the relationship with her son, she is pressed by her husband's younger brother, who has been thinking about her. She stubbornly refuses, but there is no way she can compete with the power of a man. One day, Haruka is summoned by the manager of the company, and she is even more miserable! Haruka, as a mother and as a woman, makes a certain decision in a state of numbness.