My Teacher Is The Devil?! (Lucifer Morningstar x Reader)

First day of senior year. (Y/n) has a long and boring year ahead of her before she graduates... or does she? Something weird is going on and the new teacher at school is even weirder. Funny thing is, he claims to be the Devil. When the murder of her classmate/best friend bring these two together, will they be able to solve the case? And along the way will (Y/n) fall for the charming Devil? Will she learn the truth about him? How will she react if she does?