Oh, six more chapters incoming, nice.
Seems like Karate guy and MC have similar lives (being forced into fights, loners, betrayed, not being the best at what they wish), hopefully this becomes a Buddy/Duo comic - they seem perfect for each other.
Too much attention being spent here with too little development to show for it. Could also be seen in the Yumeoka and Liu fight. It will probably get better when there are less of these chapter-consuming flashbacks. Probably.