The Outcast Is a Fighter

Cha Moo-gyeol, a mixed martial artist, falls into a vegetative state while engaging in martial arts in a no-weight class after being tricked by Chairman Jang. Afterwards, Cha Moo-gyeol is used to renew Chairman Chang's image. Eventually, he dies and is possesses the body of Cha Mu-gyeol, a high school student with the same name. A solid body with S-class durability. A status window ability that can upgrade martial arts abilities. It's different this time. With the unfulfilled dream of the strongest man, the fight to get revenge on Chairman Chang begins.

(Source: Naver Corporation, translated)