Reiko's teenage daughter, Aya, begins to misbehave and is repeatedly scolded by her father. One day, Aya's homeroom teacher, Terada, informs Reiko that her daughter's declining conduct stems from a relationship with a troubled boy named Mizutani. Shortly afterward, Reiko catches Aya at home intimately fooling around with Mizutani and angrily scolds her. A few days later, Terada tells Reiko that Aya was caught shoplifting out of suspicion, and desperate to prevent her daughter's expulsion, Reiko offers her own body to resolve the situation—only to be seen by Mizutani.