
Um why he suddenly head over heels for fl just because she acts different and dumped him and not to mention, drastically changed to a softie???

I think it started as more of a curiosity like "why this lady dump me when she was just so obsessed with me?" The later on he sees how she has changed and starts to become more interested in her. And when he begins to like her he wants to treat her better. Since she always used to act in a way that he didn't like about her it took her dumping him to see that she became better.

I think he thinks like that at first but he seems open minded to people changing. Unlike most people, I think he observed her behavior more as a hobby of sorts trying to track what she's doing to win his affection then he realizes she really changed cause he's a good judge of character. He's smart enough to realize how she's changed by observing her. People can change and he knows that. First of all he didn't really hate her to start with he just he didn't feel anything towards her enough to notice that change at first.

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Lmfao i was so confused when jinwoo died I thought it was a joke, turned out he really died LDKJDDNEJ

I haven't finished yet, but for what i know, he probably couldn't 'come' into earth yet because he couldn't find human host. (Rulers and monarch use human bodies as host) dragon monarch is equally as powerful as shadow monarch, the only reason why shadow monach has a host bc architect offer him a help

Spoiler
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Well, after killing monarch of plague, jinwoo accidentally lowered his guard, making monarch of beast and frost attacked him continously. His hp went 0 and died. Then he met ashborn in world of death, they talked, ashborn showed him what actually happened in the past. Ashborn gave jinwoo a choice wether to continue live with him in world of death of continue fighting in earth. Jinwoo choose the later, then he gained all shadow monarch's power and eventually revived(?) after became the new shadow monarch.

Im at ch3, this is so questionable. Like why did in the novel it didn't say chloe is a man?? Why did the novel just end like that? And how can he looks like a female in the first place

I can't explain the novel because I haven't read it, but he does look like a female, just very plain features. Anime characters can easily switch their genders if you tweak some of their features. If you are wondering how she also became a male, there will be an explanation for that later on. (=・ω・=)
Anyone have link for raw