Yuji has spent three years living in a dormitory while attending school. On graduation day, he feels lonely because his family is absent, but his stepmother Maiko runs up to him with a smile on his way home. He is thrilled to celebrate alone with the woman whose feelings for him have grown beyond family affection. Calling herself a gift for the adult he has become, Maiko embraces him tenderly and guides him into manhood in this adult stepmother-and-stepson role-play.