To summarize, what's going on is that:
1. Dad/Emperor was attacked by a monster on the way home from war and is currently lying in bed, poisoned, and in a coma. Chloe and Ezra (Third prince/Magic tower prince) are working to find a cure to wake him up.
2. Evenne (Bad guy/Noble/Antagonist) is using his swordsmanship school to create a secret army to plot against the royals and probably to start a new slave-trading branch. Or he's trying to recruit slaves for his secret army. Probably wise to also mention that Evenne is also Chester's mother's husband who was the evil, red-haired woman from a few chapters back.
3. Not quite sure where Zed/Second prince is, to be honest. I think he's on the hunt to find the monster that poisoned the emperor. He promised to come back after 5 years but it's already been 5 years so they probably haven't found the monster yet.
Not putting the translators' efforts to shame, but I kinda wanna try retranslating these and sharing them elsewhere so that we can get the full experience of the story. Or even just fixing the grammar would help a lot, I believe. I hope this was useful for anyone else who's as confused as I am though. Don't hold me to anything because these are merely rough ideas of what's going on. 