肖娰's Manga

Murim manhwa isn't my thing but we'll see
Chun Hajin, the strongest assassin of the Orthodox Murim’s Righteous Heavenly Alliance. Hajin loses his life as he tries to escape to find freedom.
And then…
‘The divine cult is immortal, may all demons submit. Congratulations on your recovery, third young master!’
He was reincarnated into the body of the Murim’s public enemy, the third young master of the Demonic Cult?!
The conquest of the Demonic Murim by Chun Hajin, the strongest secret weapon of the Orthodox Murim, begins now.-

I'm not a big fan of Manhua but I decided to give this a try later because alot of people in the comments says it's quite funny

Chao Yihun, who could only move in a wheelchair because of an accident, walked into another world and was told that he had a system. As long as the male protagonist went to attack here, he could stay in this world and enjoy the prosperity and wealth with sound limbs. In order to avoid dispersal, Chaoyi followed Qin Que's method of "taking the loopholes" and tried his best to improve the favorability of the "male protagonist", which led to all sorts of dumbfounding situations. He also accidentally discovered the "Original Chaoyi". The secret of death...

The comments looks pretty positive, so I'll give it a try later

In a world where destiny decides the ability one awakens, Seo Gangrim is born with the worst destiny. He awakened as a hunter, but he was the very bottom of the bottom. One day, he is ambushed… [Power ‘Destiny Stealing’ is being activated. You have obtained the power ‘Regression’.] He lost all his teammates to an assassin, but right before dying, he regressed to his past. Right then, Seo Gangrim made the decision never to leave his life to destiny again.-

Having trained as an idol for years, Sun Woojoo missed his chance to debut in TJ Entertainment because of his still sub-par skills in dancing. After being given the option to wait for a few more years or be recommended to other agencies, Sun Woojoo (with a heavy heart) decided to quit immediately and enlisted for the mandatory two-year enlistment for men in the Korean Army; planning to go to college after the enlistment and become a composer.

Two years have passed and he was on his way to take the CSAT (College Scholastic Ability Test) when he was injured from trying to prevent an accident befalling an old man. A miracle happens when he woke up and learned that gained the ability to accurately copy the actions that he sees; compensating for his dancing skills. He was contacted by a former manager from TJ entertainment and gained a chance to audition for an idol group.