question

I have heard good things and scary things about thesamefire's In The Walls.

Is this fic going to scare the living shit out of me?

I am going to read it, because I've always wanted a good Paramour fic. But this is me wondering if I should start it at night before I try and sleep, or wait until I have time to read during the day when I'm slightly less likely to be scared out of my mind. O.O