Sora Hashiba was put into the hospital for quite some time after falling from one of the school buildings. He didn't receive any major injuries, but he has lost some of his memories in the process. However, he continually sees a vision of him being carried through several dark corridors and the voice of someone calling out to him. After being released from the hospital, Sora heads back to the dorms to find that a new boy by the name of Sunao Fujimori, who will now be his roommate. He is told that Sunao is his childhood friend, but he cannot recall spending his childhood with Sunao. As he spends time with Sunao, he notices some strange things about him, including his transformation into his alternate personality Ran. On top of that, the spirit of a hospitalized schoolmate possesses Sunao and confesses his love for him. Depending on the player's decisions, Sora can either end up with Sunao, Hiromu, Ran, or Minato.