When a person dies, they either die light as a feather (aka unimportant) or heavy as Mt. Tai (aka very important).
Their nature is certainly not ordinary. So when these kind of people do not die as extraordinary people, their hearts will have some lingering wishes.
Souls with lingerings wishes in their hearts, just one bowl of soup from Meng Po isn't enough to let them forget past events. Souls that aren't pure enough can't go through reincarnation.
Therefore, they need –
Hello, this the underworld's department of purifying souls, serial number 666 Lu Heng (MC) is at your disposal. Our service objective is: fulfilling your wish to die importantly without being OoC!
Lu Heng: Left the name in the annals, this evaluation grade will for sure be S+!
Section Chief: Lu Heng, why did you break apart the CP again!! I am deducting your salary! Deducting, deducting, deducting!!!!
Lu Heng: Leader, this is really not my fault!!! QAQ
Mysterious Person: *rubs Lu Heng's head*