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As the sole survivor of a horrendous and rather mysterious accident, teenage Mitsuko's day is off to a bad start. An unstoppable force of nature, a doomed field trip, and a strange case of amnesia easily coexist in a bizarre parallel universe, where a desperate Mitsuko is always on the run from something inexplicable, intangible, and utterly deadly. However, amid piles of fresh corpses, mounds of scorching bullet shells, and rivulets of fragrant adolescent blood, Mitsuko must fight to stay alive, before her already messed-up day becomes even stranger. But one question still remains: who or what is the enemy?