Genikasuri

After one fateful match, former professional boxer Ryou Harima awakens from a two-year vegetative state to find out his career is over, his father has died, and he's been betrayed by his gym... Broken and fueled by rage, he vows to make it to the top of the boxing world, but this time as a promoter. Prepare yourself for a story about manipulation and money from the dark corner of the boxing world!!!

(Source: MANGA Plus)