Sho left home to attend a boarding school and finally returns after completing his studies. On the way back from graduation, he sees his stepmother, Hikari, unexpectedly running toward him and waving. Delighted to reunite with the woman he once longed for, the now-adult Sho spends the evening celebrating alone with her. When he escorts her to her hotel and their conversation continues late into the night, Hikari calls it “a present for the grown-up Sho” and suddenly presses her lips to his.