His life as a student living alone in the dormitory is coming to an end, and soon Yuu is about to embark on a new journey. Then, on the day of his graduation ceremony, a smiling Haruka, his stepmother who secretly had a crush on him, comes running towards him from across the street. The two spend the day celebrating his graduation together, but Haruka, who is so happy at how much he has grown, becomes defenseless and gets drunk. Desperately trying to get rid of her evil Kokoro, Yuu takes him to a hotel. However, Haruka, who is aware of his feelings, tenderly kisses him, saying, "This is a present for you , Yuu, now that you've grown up."