Akane and her elder brother Akira have been close ever since they were children, despite their age gap - Akane is now in high school, while Akira has given up his career as a police officer to pursue his dreams in music while living in a shared house with his friends. When Akira fails to turn up to see Akane, a visit to his shared house reveals that he has gone missing - and while the police refuse to investigate, Akane discovers a note from Akira hidden in his room that tells her to get out of the house as soon as possible - his four mysterious house mates are dangerous, and if she stays any longer, she'll end up dead...
