High school student Yuuma Fujikura's life is a living hell, thanks to the sadistic bullies who treat tormenting him as a game. That is, until he meets Ryou Amezato, a mysterious classmate who will risk everything to protect Yuuma. Ryou is bold, cunning, and loyal, and his methods are nothing short of vicious. Though Yuuma is unsure of Ryou's intentions, he's more than thankful for the support of a new friend. But is Ryou a guardian angel? Or a demon who will drag Yuuma into an even darker, bloodier nightmare...?