Yuko, a friend of the mother who came to stay overnight to cheer on her son participating in the national conference. Tension-filled Shinichi, who hadn't seen his first love in a long time, retreated into his room. On the other hand, tipsy and in high spirits, Yuko found Shinichi hiding in the closet... Reminiscing about the times they used to hide together in the closet, Yuko also climbed in. As they got closer, Yuko became increasingly excited and kissed Shinichi. Then she left the room saying, "Come to me after Mom falls asleep."
