beta
The author trying hard to give credit to Jooin for Cain life trying make him important when he did nothing for him. They're trying hard to make jooin still part of his life. Cain realize YOU ARE THE ONE WHO DECIDED not Jooin. Cain was ready to leave before their talk. This is what you did for yourself, not the idiot.
You can tell the author wants both ML's to constantly remember Jooin when Jooin gave nothing to be remembered.
The difference is Cain didn't run back and ruin his happiness that he learned over the years, Cain really is the winner.