[F4M] Spirit of Revenge [Servant] [Contract] [Summoning] [Sadistic Speaker] [Monster Girl] [ASMR RP]

Synopsis: You find an old dusty book lying around that clearly looks like bad news. Against your better judgement, you end up summoning a spirit that is capable of helping you take revenge on everyone that has ever wronged you. This action cannot be undone. Either you have your revenge or the spirit will haunt you until your last breath.