Delivering Food to the Underworld Just to Save My Sister

Supernatural + urban + romance + order taking mobile phone I am a poor student who works part-time as a food delivery person just to collect medical expenses for my sister who is in a vegetative state. In their eyes, I am that weirdo who never refuses an order and specializes in taking orders from "haunted houses", "hospital morgues", "remote mountains and old forests" and "crematoria", etc. They are afraid of being considered unlucky. High risk and high reward, there are hidden secrets that they don't know about...