Then Shall I Kill in Your Stead?

Synopsis

High school student Yuuma Fujikura resides in a living hell, courtesy of the vicious bullies who treat tormenting him as a game. That is, until he meets Ryou Amezato, a mysterious classmate who'll risk everything to protect Yuuma. Ryou is bold, cunning, and loyal, just about everything Yuuma could've asked for. But is he a guardian angel? Or a demon who'll drag Yuuma into an even deeper, bloodier hell…? (Source: Yen Press)