Pursuing Immortality - Chapter 20

A modern-day antihero, who was infamous for his devious acts, dies in an explosion meant to take down a powerful criminal syndicate. Waking up in a world of sword and sorcery, he finds himself possessing a fragile, powerless body with a strange “System” that seems broken. Initially thinking he's doomed, he learns that by pretending to be weak, he can manipulate others into revealing their secrets, granting him abilities they possess. As he rises in power, he discovers that the System was intentionally sabotaged—by none other than his own future self.

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates

A chubby little girl was reborn. She received a heaven defying system as well as a drastic weight loss as she advanced in ranks to become a goddess. She started a company, became the big boss, signed on superstars and filmed movies. There were no limits to her counterattacks - face slapping and tumbling around were daily occurrences to her. In the end, midway through her smooth-sailing ventures, her system would always play a few tricks. [Ding! Issuing the main mission: Host, please seduce Mr CEO with all your might!] What?? The goddess was instantly dumbfounded. Hold on!! However, the goddess suddenly turned backwards and her body dashed towards Mr CEO in a manner that was completely out of her control. One step, two steps, three steps… With a crash, she hugged onto him tightly, unwilling to let go even when her life was put on the line.

I awoke as Violet, a familiar villainess trapped in a shady corporate research lab. Screw this! With my unstoppable cloning technique, I’m getting out of here and going to the Academy to live my own life!