Betrayal Hurts (Betrayed M! Reader X High School DxD

Y/n L/n, Also known as The Grimm Reaper, lived his life as a servant in Rias Gremory's peerage. One day, he was betrayed and left behind by her in order to save Issei's life. Y/n decided to take his revenge on her and on the rest of the Devil clans and Fallen Angel's.