So You’re Such A Doctor Song - Chapter 1 - It Turns Out That Guan Ying is Fu Yu's type

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

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.

Once a young business prodigy, Violetta’s company crumbled fast thanks to internal corruption and the greed of the more successful elites.Now, she’s a certified 31 year old dirt-poor shut-in, living her best (or worst?) life as a full-fledged otaku.With nothing but her anime merch and a shaky Wi-Fi connection, she scrapes by on streaming money, all while dodging the harsh reality outside her door.However, after an all-nighter to play Merlysian Realm, a newly released VR MMORPG, she died from her unhealthy lifestyle and passed out.[SYSTEM ERROR: 404 - ACCOUNT NOT FOUND][Rebooting...][Loading...[ERROR: SYSTEM MALFUNCTION. PLEASE WAIT.].....[SYSTEM MESSAGE][You Have Received A Legendary Class][User's account balance has been updated.][Balance: UNLIMITED][Class: Merchant][Rank: SSS]“Huh?!”Not only was she transmigrated into Merlysian Realms, she was reborn in a struggling farmer's family that lived in poverty from a poorly developed kingdom in medieval times!The real kicker? It’s crawling with corrupt nobles, dying crops, zero trade routes, and is so tiny it could probably fit on a map as a dot labeled “Who Knows Where.”Can our otaku-turned-financial wizard save this sinking ship of a kingdom, or is she doomed to relive her bankrupt nightmares?Watch as she proves those who doubted her to be wrong and be accepted as a genius by using her knowledge from the modern world!

They erased her name...They rewrote his life...Now they both remember.She was the secret buried beneath the apocalypse.Lupin-13- also known as Mikka Hale-was the government's biggest mistake. A girl experimented with werewolf DNA, failed the expectations, then thrown into the deadlands like trash.She wasn't supposed to survive... But she did.Now she's a myth.A shadow in the ruins.A hunter among the hunted.Major Jay Cruz was their perfect soldier. His mission: retrieve the cure.But the “cure” is a girl...And she was the woman he once promised to burn the world for.Now, hunted by the very system that rewrote their pasts, Jay and Mikka must face what was stolen-and what still burns inside them.She was the cure.He was the blade.They'll bring the system to its knees -then to its grave.