Due to her father's remarriage, Hikaru entered the household as the new mother. Her son, Yasuo, felt intense discomfort toward Hikaru's alluring breasts and could not accept her. Ultimately, Hikaru's breasts became the reason for the divorce. Fueled by hatred, Yasuo stole every single one of Hikaru's bras, forcing her to live each day in embarrassment and humiliation. However, the situation soon worsens as a new incident orchestrated by Yasuo awaits her...