Konoha's Medical Ninja: One Punch to beat up Madara - Chapter 24 - : Different Ninja Academy Life, Premonitions

Igor had asked him to die for the world. She would ask him to die for her. Problem was, he didn't really like dying, not for a second time, at least.

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

As a lawyer back on earth, Lin Yun had never lost a case. He owed his success to three things: two blessings he received at birth (a photographic memory and the ability to comprehend anything he studies) and an indomitable will he forged himself.

Reincarnated into a poor youth in an unnamed mountain village in another world, Lu Qing expressed deep helplessness. Fortunately, he awakened an ability to see through the information of objects, giving him a bit of capital for survival. He looked at a patch of grass by the roadside.【Cow Bone Grass, average quality, medicinal, quite effective in treating bone injuries.】He looked at a red carp in the river.【Red Moon Carp, excellent quality, delicious meat, a top-grade tonic.】He glanced at a wild rabbit in the mountains.【Gray Rabbit, common wild rabbit, edible.】…Relying on his innate ability, Lu Qing gradually found his footing in the village, able to survive. Just when he thought he would spend his life peacefully in this ancient world with low productivity, one day, he suddenly saw a figure flying across the sky…