Doctor Goes Back to Joseon - Chapter 1: Baik Ganghyuk, Going to Joseon

[WARNING!!! ADULT CONTENTS!!! R18+]Syril Sylvester was an orphan in a world of superhumans. Due to his parents untimely demise, he couldn't get a power book. He became a joke in the society, a victim of several taunts and bullies. But fate had other plans...A book from the trash fell into his hands one day, granting him not only the greatest superpower, but an absurd way to level—fuck his way to stardom.A weakling suddenly became a grandmaster (on battlefields and beds).--------------------------------------------------[Welcome, Syril.][Congratulations! You've successfully fused with the Sexy Mech System.][Fuck your way up!][Stats now available.][Click here to check Stats.]--------------------------------------------------MC is OP, but his journey starts small with quests from the system. The story is ACTION and LEMONS packed. So, yeah, expect some LEMONADES and get your popcorn, because this is one hell of a ride.

Dropped

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

I’m not your slave, you bastard! She’s furious! She’s furious! I’m furious! WE’RE BREAKING UP! She’s laughing like crazy! We’ll discuss this in a hundred years She was her ex boyfriend, mother hated down and out, but he praised her as treasure, when Tsenin, you want my heart, my life, I can give you at any time