In both cases, these are single people in their 30s who have been content with their lives and routines until they feel that something is missing.
The Single Teacher Miss Hayako - nice 30s elementary school teacher who decides she probably should think about getting married. The other single teachers have had collective projects in the past with respect to things like physical fitness. Finding spouses becomes their new project.
Family's Form - a late 30s office manager has just bought a small quiet apartment, enjoys his workplace, jogging, and his nightly glass of beer. He keeps to himself. Everything is disrupted when his outgoing retired fisherman father comes for an extended stay, bringing a young teenage stepson and looking for the boy's mother who is somewhere in the city (the ML didn't know about this marriage). The FL is the lady in the apartment above, whose own mother has suddenly come to visit.