Hiroko Tagami is a freelance writer. She wants to write about why self-sufficient adults live together at a share house. She decides to go undercover and begins to stay at a share house where 4 salary people live.

A communication law is enacted. The law is to evaluate how much people are faithful to life. One day, Tomoko Yazawa receives a postcard.

Kojiro Kanayama is a kindergarten teacher. He struggles to make the kids lively.