Takamiya Karia is an ordinary teenager who is in his final year at the Sorai Academy Mixed Academy for Supernatural Creatures. One day he discovers something very shocking, Otome Hikari -a exchange girl- planned to kill him at the time of departure, but his act was interrupted by Karia's younger brother: Sieg Hart -who is part of the most wanted group of Bayview- Red Night. Right now Karia is on a Russian roulette wheel from which she cannot escape. What do the chains of fate hold for this poor young man?