Tachibana Tsukumo, a girl who cannot feel pain. Yao, an immortal boy whose only wish is to die. What will happen when these two meet...?

The story follows a girl in the "Threshold" (狭間, Hazama), a world between Heaven and Earth. "Impure souls" — those that could not ascend to... more>> Heaven with the burden of their own weight — have drifted to this world of constant warfare. <<less