Global Reincarnation: Only I Know the Plot - Chapter 911:

A series about a hyper-realistic fantasy game!“Sergeant First Class Ha, you crazy bastard. You shot another full round of bullseye?”The sharpshooter Ha LeeHa simply wanted to be a part of the army forever. However, due to an unfortunate accident, he became paraplegic and was tossed back into society.The revolutionary VR game [Middle Earth] presented a new life to him. Money obtained in [Middle Earth] has real-world value! Yet, he ruined his chance by selecting the lowest-tier character!“I’m not like the others. This is all I have.”Black gunpowder, iron balls, and ramrods… I’ll show all of you what a real ‘musketeer’ is!

Hao Yan Che is an immortal and Yuan Gun Gun is a mortal.

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

In his last life, he was a superstar that dominated the entertainment circle. In this life, he is a rebellious second generation wastrel.