Sakurakouji Sakura is just really a girl who looks graceful and small but in the reality is proficient in martial arts. After seeing a boy burning people she is startled to see that exactly the identical boy is Oogami Rei, a transfer student. Oogami is person that doesn't exist, just a code-breaker. He is. Convinced that killing is not right, penetrate his icy heart Sakurakouji sets out to prevent him.