The Demon Lord is a Weak Girl!? what is going on in this world?

Mei Shima was an ordinary girl living an ordinary life. One day she got transported to a new world while she was sleeping. She got put in a body of Sora Honda. She's a Wind and Earth mage and a pawn of the demon lord. This scares her of course and she tries her best to avoid the demon only to find herself face-to-face with her. Ren Masaki was her name and she was a weak Demon Lord. Mei was surprised and is tasked to protect the small thing. Will Mei be able to handle the wild cheerful demon? More importantly, will she figure out a way back to her home?

First story I've ever wrote plz tell me if there's any mistakes! Credits to the person who drew the cover for this book and make sure to add this to your library thank you! English is not my first language