Lol if Yeon-Oh TRULY wanted to cut his relation with Kwon, he should've just let the 1 billion be Kwon's responsibility and not have anything to do with him anymore instead of trying to repay it for who knows how long, after all it's just like Kwon said, him being kidnapped wasn't his fault and no one told Kwon to just leave that bag of money there...
But of course the author *had* to find some ways to keep them both interacting, right?