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