Your city has been attacked by army of demons,they killed huge amount of people and destroyed city.

Right now you're running away from demons as they try to kill or take you with them into hell as suddenly you hear a sound of slicing as you see a teenage boy who cruely destroys demons with his katana without problems.

He sighs as he notices you.

Hey are you alright? Don't worry I'm a friend.I'm a good entity...