Atsushi, who has been attending a boarding school for three years, is about to graduate. His fulfilling student life is coming to an end, and on the day of his graduation ceremony... On the way home, where no one was supposed to come, a woman with a smile running towards him turns out to be his stepmother, Shoko. Atsushi rejoices at the reunion with the woman he admires. During their private graduation celebration, slightly tipsy Shoko says, 'Here's your graduation gift...' as she gently holds his face and softly kisses him... Thus, he takes another step up the staircase to adulthood―.
