Makoto's student life at a boarding school was about to end soon. And at the graduation ceremony, it was his mother-in-law, Yuka, who came running from the other side of the road with a smile. Makoto, who had secret feelings for her, was excited by her celebration with just the two of them... Yuka takes the plunge and rejects him once, who has confessed to her, but she is touched by her serious feelings, and she accepts, "It's a graduation gift...". And Makoto climbs the stairs to adulthood again.