I Dropped Dead and Joined the Underworld. My Ghostly Sister Keeps Me Safe Until

I worked myself to death from overtime. When I opened my eyes, I was the weakest new recruit in the Underworld. On my very first day, a vicious ghost came looking for trouble, and just as I was about to be obliterated, Sister Hong Ling stepped in front of me in a flowing red robe. “Touch one of my people, and you’re dead!” From then on, I lay flat under her protection, trained my way to the top, and investigated the truth behind my death from overwork. I rose from a lowly ghost to a god, only to discover that the ghost envoy sister who protected me was someone engraved in my soul in a past life!