Levi gets turned into a cat in the middle of the night and comes to your room to escape Hanji using him as an experiment again. You don't know and take the cat in but Hanji ends up telling you and Levi finds out his true feelings for you when he turns into a cat.
I don't really know this is my first neko story and I decided that it would be a good idea to have him turned into a cat by Hanji for a night instead of him being one the whole time. So read and hope you all enjoy. :)