Yosuke Tomikawa is married to Mizuki. They have a daughter, Shiori, and a son, Hikaru. Yosuke works as the general manager in the personnel department at a large company, Mizuki works as a teacher at a private middle school, Shiori works as a jewelry maker and Hikaru is looking for a job. The family appears to look like a peaceful family, but due to an accidental opportunity, the family begins to collapse.