
Is the dad went to past or something? In the original he didn't care about MC and only care about the blonde haired princess, but now he cared for MC and hostile towards the blonde haired princess?
Well some may be evil and some may not, but still he is the father of both, so I think he should treat both of them equally. Or else the same thing will repeat again.

No I think you're mixing it up with that other one that says "Who Made Me a Princess?" And that one has like the two girls with the jewel crazy eyes. This one is more like in her og story,, she was the villainous princess that killed her own father and the original story, and try to take over as Queen but ends up being killed by a rebellion... because they liked the other Princess more than her So... right now, she is avoiding any confrontation with the other sister so she doesn't look bad and get killed by a rebellion

http://yeahmanga.com/CollectionList/Boylove/Lonely/Chap-6
You can read upto more than 50 chapters of English translation in this site.
Is the queen gonna die at the end? If so I'm not reading this
I feel like the story right now is the first timeline or something. and there might she might go back in time. because ch.1 starts with her death kinda. idk tho