So a summary of the chapter, and the flashback
King Il always was a happy go lucky guy who would not have cared for the throne if it wasnt for the big events we have seen now and told before
Yong Hi was a woman who was afraid of the world, and fell in love with an overbearing prince with a lovefor violence
Kashi was a simple servant of the temple that was protected by Il and later married him (we dont know her feelings)
AND wow for Yu Hon, it took his wife 5 minutes to find out that the priest were, although over the top, but just reverent and jovial about having proof of their dragon jesus alive and walking, he didnt even try to find out SHIT and just decided going all genicidal; no wonder the previous king decided he wasnt fit jack to be the king.
and So Won, if he knows half this story he doesnt deserve a redemption arc for not being able to understand how utterly stupid his father was