Mai Satsuki marries into the Kudo family as a second wife, living with her husband Takeshi and his two sons: the delinquent eldest son, Hidetake, and the mother-dependent younger son, Manjiro. Having divorced her previous husband due to unbearable domestic violence, Mai is drawn to Takeshi's kindness and decides to remarry, hoping for a fresh start. However, serious problems lurk within her new household—namely, Takeshi's children. Hidetake becomes violently aggressive, attempting to force himself on Mai, while Manjiro clings to her obsessively, unable to function without her attention. One day, their dependency spirals out of control, triggering a dramatic shift in family dynamics.