MTL - Comprehensive Manga: Starting From Teaching Hinata’s Black Coffin, It Will Be Returned 10,000 Times - Chapter 108

One day, the whole world gamified in the eyes of Su Mo.Not only could he use his lifespan to draw cards, but he could also see the hidden attributes of every item in life.As such, when he looked at the hanging lamp above him, he saw:[Item: An old hanging lamp][Hint: It will drop after one minute and seven seconds.]When he looked at his right arm, he saw:[Item: The right arm of a young man][Hint: The grip strength of his right arm is 3% stronger than that of his left arm due to continuous training.]When he looked at the ginseng on the table, he saw:[Item: A stalk of wild ginseng][Hint: It is tinted with a layer of source power. Consuming it could make you feel energized.]…Excited, Su Mo rushed to meet his girlfriend, who was a school beauty and had just agreed to date him.He then saw a bright red HP bar on top of her head.[Item: A very thirsty fox demon][Hint: You might not be able to put up a fight against her.]

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

Before her rebirth, Song Ran lived a lone and miserable life. Her innocence and naiveness cost her fortune. Her family assets was wasted by the stepmother, and her man stolen by her very best friend. After she was reborn, having the scales fallen from her eyes, Song Ran learned from her mistakes. The first thing she needed to do was ride on the coattail of her man with a promissing future, Mr. Gu.

What do you do when your brother dies because of some entitled assholes? You go undercover.My real name? Clare. But at school, I’m Clause—just another guy blending in. Disguised. Watching. Yes, a boy. No, it's not an all-boys school—I'm just deep undercover, hunting down the bastard responsible for my brother’s suicide. Nobody—and I mean nobody—messes with my precious brother and gets away with it. They better pray I never find them, because when I do? Death will be a mercy, and trust me—I don’t do mercy.And as for the egotistical Alpha and the narcissistic Vampire Prince? They can go fuck themselves. I don’t do mates, I don’t do claiming, and I sure as hell don’t do them.