Responses
Spoiler
Yeah, she and Emel do end up together. It's a bumpy road along the way but they do end up together.
Honestly, that's all I'm aware of so far, I can't say for sure that the ending will be all unicorns and rainbows, I mean from the way the story is going so far, I'm sure there will be....unhappy events? Idk how to put it in words. ╮( ̄▽ ̄)╭
Considerably major spoilers ahead, about why Emel is acting as he is, read at ur own risk...
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One of the reasons as to why Emel 'works' for the princess, is to find out more about the curse that bounds the castiellos to the royal family. I think he's trying to find a way to free them from the curse.
I get how everyone is labelling him as a jerk for his insensitive actions, but there are loads of reasons as to why he's doing what he's doing. I get that there are other ways to achieve the same thing, without hurting Estelle or whatever but this is the only way he can see fit, to achieve everything without burdening anyone, especially Estelle.
During his time with the princess, he was abused, manipulated physically and mentally so he went through a lot, for the sake of the Castiellos. The reason he didn't want to tell Estelle is to because he knew she would beat herself up over it; the fact that Emel is sacrificing so much for her sake. We all know that our fl would not take that well since she cares for him. She'd be ridden with guilt.