MTL - Shoujo Grand Summoning - ~ 1968 Three things left by the semi-god powerhouse? ...

Ye Xiong was an infamous war machine — feared by the world and known to many as the God of Death. After an incident, he returned to Jiangnan city and faked a marriage to the Ice Queen President, Yang Xinyi.This is the story of a shameless sugar baby and his quest to conquer a group of beautiful girls, including the Ice Queen President, and win their hearts!

As a transmigrator turned extraordinary creature of the human race, he found the world to be more colorful than he had imagined.To more easily access everything this new realm had to offer, he first needed a special resume. Then, he had to find the right place in a city perennially shrouded in fog to fill out an application, and the last and most critical step...— was to kill a chicken or catch a mouse.

[By the Author that brought you “Martial God Regressed to Level 2” & “The Swordmaster Who Returned After 1,000 Years”]A year has passed since the world turned into one ruled by hunters, and suddenly, I awakened.But that’s not all.I possess an extra status window that even includes a built-in strategy guide.

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 realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates