Adult Akira has spent three years away from home at a boarding school, and now graduation day has finally arrived. On his way back with friends, he sees his stepmother Ryo approaching with a smile. He has admired her ever since they first met and can barely contain his joy at celebrating alone with the woman of his dreams. Delighted by how much he has grown, Ryo drinks too much. When he takes care of her, she rewards him with a passionate, lingering kiss as his graduation gift...