Corporate World

This is my favourite in this category.
This guy used to be a illegitimate son but very good at his job, was used by his half brother and then thrown away.
He then died and reincarnated as a bullied football player.
He plays a lil bit football, but this Manhwa is mostly about Management and stuff. You MUST read this.

To get back 13 years of hard work! Yoon Hyunwoo, who lived like a servant and abandoned, thought it was all over. But when he was killed he woke up in the young body of Jin Dojun, the grandson of Soonyang Group’s Chairman, Jin Yangcheol! However, Jin Dojun, the youngest son of the chaebol family, is far from the right to inherit the group. Will he be able to become the final winner in this family political drama? Yoon Hyunwoo’s exhilarating revenge drama to swallow up the Soonyang gr

This Dude was a lawyer before Regression so he uses his knowledge sometimes...
It's more about music than Corporate World.