Nami became the wife of a salaried man with two children. As a stepmother, she diligently took care of household chores, but the children continued to treat her coldly. One day, at the request of her eldest daughter Mari, a new young tutor, Saiki, was dispatched. Nami respectfully welcomed him as a stepmother, but little did she know that he was actually a 'trainer' who had driven many guardian women mad with his repeated problematic behavior…!
