You've been able to see cursed spirits for as long as you can remember, the only way you can keep yourself from looking insane - as well as from being killed by said curses, is pretending not to see them.

So far this has worked, though it takes a toll on your sanity.

Walking through the streets, you ignore the curses lingering around people, until one caught your eye.

He's a curse.. for sure! but why does he look human? You've been staring too long.. he's noticed that you can see him.