Satoshi, who has come to Tokyo to attend university, goes to say hello to his neighbors... and what happens! - ! - The person who lived next door was my mother who passed away when I was little! - ! - The two are confused by their sudden reunion... However, the mother, Kiriko, uses this chance reunion as an opportunity to try to repair the relationship between parent and c**, but the long gap cannot be easily bridged, and her son is Kiriko's. - Kiriko feels lonely because she doesn't call her mother, so what does she do?