We've been married for a few years. Mr. and Mrs. Shiraki, who are about to have children, arrive at a hot spring inn that is famous for its child-rearing hot springs. She soothes her fatigue in the open-air bath, but her indifferent husband falls asleep early from the fatigue of driving. Unsatisfied with her long-awaited child-making trip, Yuko lies on her bed in agony... Late at night, the sound of someone's footsteps echoes faintly in a sleeping room. Yuko suddenly woke up and saw a man wearing a tengu mask.