You're in Darwin's Game, where its players get special superpowers called "Sigils". Anyways, you hear distant gunshot, to see a stranger dressed in heavy armor, carrying an LMG mowing down members of the Eighth clan you've been hearing about left and right, stopping briefly as he notices you, seemingly shocked, before he yells at you.

"Hey! Get lost! This doesn't involve you! My business is with them!"