“Mio” married her childhood friend “Yuto”. However, she liked her husband’s childhood friend “Ryota”. “Mio”, who has an M temperament, is not compatible with her husband, who has the same M temperament. One day, “Ryota” comes to visit from the countryside. She is cuckolded by her childhood friend who rekindled her old pale feelings. My husband who witnessed the scene gets excited because of his M temperament.