After his mother passes away, Kazayuki goes to live with his step-brother, Futaba. Futaba is excited to see that the older brother who comforted him as a child is now his new roommate. Unfortunately, Kazayuki seems cold and distant during their reunion. One day, Futaba catches Kazayuki with a girl and starts to acknowledge his own romantic attraction to his step-brother. However, Kazayuki remains silent and Futaba is left nervously waiting for a response.