(Sonic Boom AU) Mephiles x Reader (Living with a Demon?)

You let a demon hellbent on destruction inhabit your body. What could possibly go wrong? Will take place in a Sonic Boom AU. Title is stupid, I know, but I suck at titles hahaha. I ended up falling for Mephiles after seeing him in Sonic 06. I just have a thing for bad guys, okay? Might end up mature later, so watch ou...