Tomodachi no Imouto ga Ore ni Dake Uzai - Volume 4, Chapter 10: My friend’s little sister is annoying towards the [5th Floor Alliance]

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

Our straight (?) bottom woke up ten years into the future and found himself on the bed of his childhood friend… At the start, the bottom was shocked to his very bones, but he soon quickly accepted this premise and found the whole situation to be rather amusing. Precisely then, the bottom once again went back to his timeline — back to when he and the top were just platonic childhood friends.

Liu Yuan transmigrated into the world of a Xianxia online game named “Shang Yang” after he maxed out the stats for all the playable characters in the game.

Liu Yuan barked, “Usually, people receive a system or cheats when they transmigrate to another world. What am I supposed to do with this illustrated handbook? And I can only target female characters?”

For the sake of survival and becoming stronger, Liu Yuan once again embarked on the journey of gaining the favorability of NPCs. As such, the most despicable liar and outstanding lover in the history of Shang Yang Realm was born.

“If I don’t die… I swear I will act on all my evil thoughts..”

Not exactly everyone’s typical thought when they’re about to die. What will a cowardly young man do when reincarnated with the evil powers to redefine his destiny? Can the natural kindness of human nature triumph over evil? Will he become the cold-blooded demon king of legend, or will he forge his own path and rain down another kind of terror?

- Description from novelupdates