(Y/N) is your typical freshman girl. You know the usual clutzy, shy, over achiever with a badass double life. In the day time, she's bullied by her fellow classmates for being a neko-human hybrid despite looking almost 100% human. At night, she's feared by monsters and humans alike. Stabbing anyone who tries to get too 'touchy feely' with her. When (Y/N) accidentally bumps into Gaster Sans trying to beat the tardy bell, everything changes.