Rooted in the legend of Momotarou, this action manga reimagines the ancient conflict between humanity and the demonic Oni in a contemporary setting. After a violent encounter forces teenager Shiki Ichinose to confront his Oni ancestry, he enrolls at Rasetsu Academy to master the destructive power running through his blood. The series balances its folklore foundations with sharp character dynamics and a personal revenge narrative that gives the supernatural battles real emotional weight.