I Am the Underworld's Errand Boy.

Jiang Ziyu, a twenty-three-year-old social beast, made a mistake due to a strange seduction. Branded with the Nether Seal, he unexpectedly became a secret agent in the underworld. Pass by Living the life of an ordinary person, walking in the yin and yang while giving people shots during the day Work, working for ghosts at night. After seeing the selflessness of the underworld, I also Travel through the bad lands of the world. Using the seal of the netherworld as a basis and the body as a blade, Walking between the yin and yang worlds, illuminating the return journey of souls who have died in vain.