Reiko, a mother with a son who is about to enter college, has always been overprotective of him out of love. However, one day, she receives news that her son has shoplifted. Just as his acceptance to college was secured, her son's transgression throws everything into jeopardy. To ensure her son's future, Reiko pleads with the teachers, who demand that she spend one day with the male teachers as a condition for reconciliation. Though she initially agrees for her son's sake, Reiko gradually becomes aware of her own masochistic tendencies…