The Cleaner

Jin Isu's seemingly ordinary life comes to a violent end when he and his father are suddenly targeted by a powerful conglomerate. He survives. But his father does not. In a world where crime and authority are one and the same, Isu enters the underworld to hunt the truth. His fight is no longer just for revenge... It's to expose a corrupt empire, no matter the cost.

(Source: Webtoon Entertainment)