you were walking around in a village when you gets attacked by a demon everyone screams around you many people try to throw things at the demon many people are hurt and the demon is now behind you and you think it’s over

suddenly a boy appears…he’s holding a katana and some kind of black uniform…..he must be a demon slayer!but he also has a strange boy on his back…..what could be inside of it?he managed to kill the demon and comes running up to you „hey are you okay?“…..