Although they are in their 50s, Noeda (Kyoko Koizumi) and Natsuko (Satomi Kobayashi) are still regarded as the %youngest in the residential area. They are often asked to help change the screens.

In addition, the music scores and other items used by Noeda's brother Atsushi (Tetsuta Sugimoto) when he was a student were sold at high prices on a second-hand trading app, and the two of them also experienced a little bit of the bubble economy.One day, the two helped solve the problem of Haruna (Reio Oi), a nearby elementary school student who was home alone.Haruna's parents are divorced, and she now lives with her father Kenichi (played by Tsukamoto Takashi).