An older brother who has loved "Mayu" since he was little returns to his hometown for the first time in a few years. However, his older brother makes a shocking confession that he has come to tell his father that he is going to get married. If you can connect with your older brother, I'll give you all the important things about Mayu. Immoral and sweet but sad ending sexual intercourse with Mayu and her brother. ... Goodbye, my only brother.