Yu, living alone in a dormitory school. His fulfilling student life came to an end, and finally, it was graduation day. On the slightly lonely way home, someone ran towards him with a smile—it was his stepmother, Kazumi. Overjoyed by the reunion with the woman he admired, they spent the night celebrating his graduation together… The two of them talked to make up for the time they had been apart. Then, "A gift from me to you now that you're an adult, Yu" and Kazumi's slightly moist lips gently sealed his… That day, he ascended another step into adulthood―.
