Sirens. Enemies from another world. But what if not every siren was bad? What if some sirens didn't agree with the others? That's what this story is about. A siren fighting against his own, to save a world that isn't even his.
Thirty years ago Eurasia was hit by a devastating phenomenon called a "Spatial Quake" resulting in 150 million casualties. Otsuka Rin, a teenage boy who lived a normal live, that is before he sacrifised himself to help other people, causing to his death. after that he was given a chance to live another live, but this...