CRYSTALLIZE || TMNT 2012 x Isekai!reader

You wake up one night from a nightmare now unable to fall back to sleep, so what's your next best thing? Go on a midnight walk cuz creeps def don't exist tf😜Anyways.. As you walk around the block you notice a huge silhouette stalking behind you, and it's definitely not human.. What happens when it begins to chase after you? How the hell is there a purple spiral...portal..? (I don't know science is hard.) And why did it slam you into the wall of some sewer...and what is that green figure making its way towards you? Read and find out(great advertisement if you ask me)😉

Tw;; a bunch of cursing and blood(pls comment if i should warn about anything else)
lowercase on purpose
This is so 2019 of me ik. My first book bro pls don't make fun of me i js got bored one day😩Also technically a Nezuko!reader, simply read to figure out what that means. IM TRYING TO MAKE IT SO ANYONE CAN READ IT SO IF I USE SHE/HER PLS JS IGNORE IT!!! i do not own any of these characters, pictures or show in general!(the cover photo is not mine it was found on pinterest)