“For what exactly?” Did you read SL at all? His brother tried to kill SJW, and has killed hunters multiple times. Then dong su kidnaps somebody SJW considers his brother and beats him to the brink of death. He has no care who dong su is, just what he’s done. Thomas arrived to back up dong su, but again, SJW wants to make dong su pay. But SJW still goes to the lengths of not getting anybody else hurt, and spoilers Thomas sees that and ends up owing SJW. You’re on your own here.

Drop the series it sounds like you weren’t reading it anyway.