Kouji and Hinata are living together with the intention of getting married. The company president plans a celebratory camp for the two of them, who started dating at an in-house camp, but Kouji is unable to go due to sudden work commitments. Kouji worries about Hinata's inability to stop her when she drinks, so he keeps in touch with her, but he gradually loses contact with Hinata. Unfortunately, his worries about Hinata not answering his phone came true, but Koji had no way of knowing at the time...