https://www.novelupdates.com/series/i-have-a-secret/

Description

Huang Dan's pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks...

In the first world, Huang Dan realized what it means to die painfully and to live to die again.