Akira left his parents and went to a boarding school. Three years of student life passed in the blink of an eye, and it was graduation day. On his way home with a friend, his stepmother Ryo came towards him with a smile. Akira couldn't hide his joy at the graduation celebration with the woman he had always had feelings for since they first met. Ryo was so happy to see his son grow up that he couldn't help but drink too much... And as a graduation gift for him who had looked after him, he shared a passionate and deep kiss.