Responses
Spoiler
Joonghyuk does it on purpose for the sole reason to continue the scenario. They had a time limit to kill off kim dokja, that will turn into a demon king. And Dokja is the one who told them to kill him before he really became a demon king and kill everyone. So yeah It's forced. I was bawling my eyes out when i read that scene. But they all of them tried to kill KDJ, It's just that YJH that took the last blow.
i need someone to spoil me and tell me who kills dokja