Erika and Masashi, a couple in the working world who were dating with marriage in mind, happily set goals for themselves, such as "We want to have two children in the future," and lived their lives. Erika's ex-boyfriend, Kuniwo, was the worst kind of man - involved with drugs, violence, and insurmountable debts. Despite Erika's numerous attempts to break up with him, she was unable to do so and eventually fled, meeting her current boyfriend and moving in together.