In this world and the next, both good and evil exist. But who do you call when evil spirits from the afterlife escape to prey on innocent human lives? You call the Counters, people with supernatural abilities...

Aiko should be dead, but when she awakes in a secret hospital, she has no recollection of what happened that night. Until a monster showed up and her memories flood back. Her arm changed into a powerful weapon...

Witches suddenly declare war against humans, causing two-thirds of the world to fall apart.They summon monsters called "Supporters" and devastate human residences but why? Survivors gather people with the power...