After Shadow goes missing, you were left all alone. One day he returns but, something doesn't seem right. This was an idea I got while listening to the vocaloid song "A love story of a certain bakeneko"

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 out for that 👀 Female!Reader