Issei the Assassin (currently not writing)

An 8-year-old Issei hyoudou was standing Infront of his dead parents' corpses. They were slaughtered, but who? Well, that question was easy, the world. We live in a corrupted world where the supernatural reigns supreme. Devils, angles, fallen angels, and other supernatural creatures, but you know who was worst? Humans, their desires and greed, and selfishness allow these beings to control the world. That was the day Issei Hyoudou decided that he will purge the evils from this world
even if cost him his humanity, even if his soul will go to hell, at least he knows that the evil people that he slaughtered were at a deeper part.