Legends of Chaos: Chaos Pawn of the Gremory

Kazuma Soryu is a seemingly normal high school student until the day his apartment is attacked and destroyed by a monster. His home, and life, are invaded by a person claiming to be a Soul Reaper. He then later finds himself embroiled in the conflicts of angels, fallen angels, and devils, again. Though Kazuma spends a lot of effort trying to seem "normal." MULTI-CROSSOVER. OC Story