Worried about her son who failed his college entrance exams and became a ronin student, mother Hisako tries her best to support him. His father is overly concerned with appearances and constantly pressures the son to study, causing the boy to accumulate stress, frequently lashing out in anger. One day, Hisako is accidentally caught having sex by her son. Using this incident as an excuse, the son claims he "can't concentrate on studying because of his mother's lewd appearance" and begins making sexual demands toward her. Shocked by her son's sudden change, Hisako struggles with how to respond to his advances. A deeply emotional story exploring family bonds and inner conflict.