On his way back home from school, Y/N trips and loses consciousness. Once Y/N wakes up he finds himself tucked into his bed like nothing happened. Although when Y/N gets up a voice with a deep pitch starts explaining that a new war between Angels, Fallen Angels and Devils has started and that Y/N now has been reincarnated into a Devil whom possess a secret sacred gear. Y/N will have to choose his path. Will he be a Lone Wolf, or will he join an alliance. DISCLAIMER: THE OTHER CHARACTERS SUCH AS RIAS GREMORY, ISSEI AND SO ON ARE NOT OWNED BY ME.