Akira left his parents' home to attend a boarding school. Three years of student life passed in the blink of an eye, and the day of his graduation arrived. On his way home with a friend, his stepmother, Ryo, approached him with a smile. Akira couldn't hide his joy at being alone with the woman he had always loved since they first met, celebrating his graduation. Ryo was so happy to see Akira's growth that he ended up drinking too much... And as a graduation gift for him, who had looked after him, they shared a passionate, deep kiss.