Tatsuki Hayako is a single 34-years-old woman. She works as an elementary school teacher and she is generous to kids. Hayako likes to eat and drink. Her hobby is working out. She thinks she wants to marry someday, but she doesn't do anything to meet a man for marriage. Hayako is happy because she has a good relationship with her parents and she is surrounded by cute children at her school. Nevertheless, Hayako feels lonely at times.