Kenta left his family home and spent three years of school life in a dormitory. That life is about to end soon. After the graduation ceremony, as Kenta walks down the school route with friends reminiscing about old times, a beautiful woman appears before him. She is Nanaiko, his father's remarried wife and his stepmother. Nanaiko came secretly to celebrate Kenta. Rather than a mother, she is more of an idolized woman to Kenta. As it turned out, Kenta ended up celebrating alone with such a Nanaiko. Overjoyed, Nanaiko drank too much and got drunk, so Kenta had to send her to the hotel where they were staying...
