[Apocalyptic background + lighthearted comedy + daily life, non-hardcore survival]
There is a rare card INFP Mediator in the Type 16 Personality Test. It only accounts for 3% to 4% of the population. Some people call INFP Little Butterfly, but eventually they call him Butterfly.
Qiao Jin is such a little butterfly, living a simple and introverted life. Facing the ordinary life, he thought: "I want to die every day, but there is someone else who deserves death." Facing the same apocalypse as in his dream, he thought, "I must live well for the sake of my family and friends." Facing the cruel truth, dirty and greedy people's hearts, and dead friends, he thought, "No one wants to run away, you all have to die."
So you turn into a black butterfly and become a murderer, creating the apocalypse.
