The Heart System - Chapter 35

An ordinary young man on earth, Xia Feng, traveled to a world of sword and magic, and took the body of Lucien Evans, another ordinary young man.

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

The first time she bumped into him, she wiped her sweat on his suit, and he took it off and said to throw it away.The second time she knocked over a bucket of water, splashing his shoes and pants, he actually threw away his shoes and socks!Gu Yan was thoroughly unsettled, a germophobic fussiness is an illness that needs treatment!What happens when a man whose cleanliness drives everyone crazy meets a carefree woman?One day, Young Master Tang cornered Miss Gu against the wall, “Let's talk about the question of taking responsibility!”

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