Her husband was not interested in her son's growth because she was busy with work, and she was also sexless, and Kana was lonely. One day, Kiriyama, who is in trouble because her mom is in trouble because she has a breakdown, leaves her child at the same nursery school, and decides to help her. After a lot of small talk, the two meet again on the way home from shopping in the evening and exchange contact information. On the way home that day, Kiriyama delivers the child's handkerchief that Kana dropped to Kana's house.