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A mysterious man butchers his way through a busy train car in Tokyo. This marks the starting point of a series of mysterious incidents. Renji Amamiya is attacked by Toriko, a prostitute with whom he is in love with, but he is saved by father Mitakura, a renowned exorcist who reveals to him the existence of demons...
A teenaged outsider with strange new powers is Earth's only hope against a horde of demonic invaders! When high school student Yousuke Suruga accidentally breaks an ancient shinto shrine, his physical body merges with the Bow of Suzaku, an enigmatic weapon from ancient times. Yousuke's only hope lies with Ezo, the eccentric history teacher who wields the Spear of Seiryuu, another mystic weapon that, when combined with the Bow of Suzaku, may be the world's only hope against the ever-growing threat of the monster realm.
On a remote island, a skilled swordsman who honed his craft on the local population attempts to atone for his sins and lift a curse by hunting and killing demons.
Percival has always lived with his grandfather on the idyllic, remote God's Finger. And though Percival loves the simple life, he longs for adventure. That is, until adventure comes knocking at his door, tearing away everything he's ever known and leaving him alone in the world. Now Percival has no choice but to go out into the world and see what it holds...after all, it's his destiny!
Fear runs rampant throughout Tokyo with the revelation that demons in fact exist amongst us. Paranoia and the darker side of humanity boils onto the streets as people turn on one another, suspecting that anyone could in fact be a demon hiding in human clothing. Amidst the growing tensions, tragedy strikes Akira causing his mind to snap, retreating into his subconscious, allowing his Devilish alter-ego Amon to break free from Akira's cage of flesh and wreak havoc on both human and demons alike.