As the Overfiend continues to assert itself inside of the body of Tatsuo Nagumo, his supernatural changes are starting to affect the people around him. Gradually, dark urges inside Tatsuo’s human soul are overwhelm him as a slew of murders grip Tokyo in fear.

Once the Overfiend has been discovered, The Demon Realm begin to make their move, recruiting a classmate of Tatsuo who’s bark is worse than his bite. But when that bite is strengthened eight-fold at the cost of his humanity, can Tatsuo fight off this new threat?