Shunsuke and Ichika are living together with the intention of getting married. The couple first started dating after a company camping trip, and as a favor to the company's president, a camping trip was planned to celebrate the couple, but Shunsuke is unable to go due to an urgent work matter. Worried about Ichika, who can't control herself when she drinks, Shunsuke contacts her frequently, but the later the night gets, the harder it becomes to get in touch with her. By the time Shunsuke realizes something is wrong, the situation has already become irreversible...