The human world and the demon realm were once separate, but after the "Pillar of Heaven collapsed," the two worlds began to merge, and demons started hiding among ordinary people. The protagonist is an ordinary college student who one night rescues an injured white fox, unaware that she's a princess of the demon clan.
To repay him, the white fox signs a "Demon Pact" with him, sharing her life and power. But once the pact is sealed, enemies of the demon clan and demon hunters come after them. Worse still, the protagonist discovers that the blood of an ancient "Demon-Suppressing Master" flows through his veins, making him a sworn enemy of the demon clan!
