By day, he works to earn money and buy supplies for his future granddaughter.
At night, he dies and works in the Underworld, earning ghost currency to upgrade his granddaughter's System.
By day, he comes back to life and keeps working to earn money for supplies.
At night, he dies again and goes on working in the Underworld for ghost currency.
One night dead in the human world equals one year alive in the Underworld!
Cui Kai, the chosen wage slave, has to work whether dead or alive.
After working in the Underworld for his granddaughter for a full 365 years, she finally sends him a video call from the apocalypse!
His granddaughter Nuannuan says, "Grandpa, I'm sorry you've had to go through this. My System still needs more upgrades, so try to find a better-paying job in the Underworld, okay? Otherwise, even if you die another ten thousand times and work in the Underworld for another ten thousand years, you still won't earn enough ghost currency!"
Cui Kai: ...She's showing such filial piety that Grandpa could die! What a wonderful granddaughter!
