I became the Devil's bodyguard

Maya Donovan finds herself in a compromising position. She doesn't remember who she is and where she came from. The doctors resurrected her , she was dead for exactly five minutes. It is a miracle that she survived. She had come from the Death's door, but she returned with someone. An entity which could make disasters appearing from left and right. The dark entity wants to go back to where it belongs and Maya couldn't agree more. There's only one problem. She had to find the Devil of this world . The Devil will help her only for a cost. She has to become his bodyguard. All she could think is "What kind of nonsense is this?"