In one night, a case took place involving Koharu (Yuko Tanaka) and her 3 children: first son Hiroki (Ryohei Suzuki), second son Yuji (Takeru Satoh) and daughter Sonoko (Mayu Matsuoka). Afterwards, each member of the family lived separately. 15 years later, the family meets again. Second son Yuji works as a freelancer writer. First son Hiroki has a hard time communicating with other people. Daughter Sonoko dreamed of becoming a hairdresser, but she gave up on her dream after what happened 15 years ago and she now works a snack bar.