Erika and Masashi, a working couple who had been dating on the premise of marriage, lived happily with goals such as "I want to have two children in the future." Erika's ex-boyfriend, Kunio, was the worst kind of man, a useless man with drugs, violence, and debt. Erika tried to break up many times, but she couldn't break up and she ran away, and she met her current boyfriend and lived together.