Atsushi has been enrolled in a boarding school for three years and is about to graduate. A fulfilling student life is coming to an end, and on the day of the graduation ceremony ... On the way home, when no one was supposed to come, the woman who ran with a smile from the other side was her mother-in-law, Shoko. Atsushi is delighted to be reunited with the woman he longs for. Shoko, who is tipsy at a graduation celebration with only two people, gently wraps her cheeks and kisses him softly, saying, "I'll give you a graduation gift ..." And he climbed another adult staircase.