Gu Ling, a burned-out office drone, is squeezed dry by his unscrupulous boss and cheated on by his girlfriend. The night he drops dead, he binds to the Substitute Death System and sets off alone to tackle the Underworld's KPIs!
Others cultivate yang lifespan to seek immortality. I cultivate yin lifespan and die in place of ghosts. One second as a substitute earns me a year, and I level up by the second!
That heartless boss? I'll turn him into a battery! That two-faced ex? I'll make her a lampwick!
Then a nine-tailed fox draped in moonlight comes rushing in, begging me not to die and pressing a thousand years of demon lifespan into my palm:
"Gu Ling, if you want revenge, I'll be with you. If you want to defy Heaven, I'll be with you. If you die, I'll make the whole Underworld pay!"
From then on, the living fear me, the dead respect me, and the Heavenly Dao wants me gone. With my fox-demon wife by my side, I fight my way through the nine realms of nether cultivation and become a supreme sovereign!
The living world owes me, and I'm coming to collect, with interest!
Others are in the human world, but the protagonist is in the underworld, so there is little competition. Plus, there are also workplace KPIs in the underworld.