Demon City Oni Goroshi

The mc gives off similar vibes. Both are cold-blooded killers, but not to people who are precious to them. The action choreography on both is also very satisfying to watch.

Both male leads are on a revenge spree after losing loved ones.
They are both retired contract killers.
The story features graphic, gory killings.

Both feature solid action.
Both plots involve the male protagonist's daughter.
The difference is that Agent Kim has a touch of comedy, while Demon City tends to be dark.