
The pacing is all over the place, some actions make no sense and world building is also kinda poor. Elena egged her brother on against her sister and didn't see it to the end ? Especially when it was a rehearsal for the opera and she is the main singer, and she basically hates her sister / mc so watching mc being hounded would have made more sense. Another thing is that usually opera has multiple singers who play different characters but we didn't see that either.
The villains are such idiots to kill off their golden egg laying goose.
As long as the revenge is satisfying the rest can be glossed over after all people can't expect fast food to be gourmet meals and fast food can be fun from time to time.

Just waiting for the empress to get justified end. You might as well consider her the 3rd villain of this story.

Antagonists
The antagonists are the crown prince and crown princess.
Readers shouldn’t take this story as ordinary romance fantasy. This story is written more like classical literature. The author doesn’t do cartoon villains. All characters are written like human beings. Therefore, just like in real life, it doesn’t mean people who are simply mean-spirited at times is going to be punished for simply being mean. Only evil doers will get their just desserts. Meaning, only people who commit crimes that are worthy of death will be punished like killing other people and brutalizing other people.

Thank you for the long paragraph on justice(you were probably bragging so I'll just listen you brag). I simply wanted to know the 2nd villain because oscar is the 1st and the empress is 3rd like you said. I couldn't think of anyone evil enough to be deemed as 2nd after oscar...i think I'm forgetting something. The crown Princess wasn't simply oscar's mistress right? Okay gonna re-read everything again. (=・ω・=)

Did some comment made you angry...? Not me right? I never wanted ines to take revenge or anything. Poor girl just wants to live a normal life and die peacefully. And that son of a bitch oscar won't let it happen so he needs to die along with his party. Mommy empress and new enemy crown Princess included..like go away! Live my girl alone. Sigh anyway, I'm not one of them #-.-)
The climax resolved so fast that it was anticlimactic and the ending of the villains felt boring even though I did like the plot points. This is why pacing is important in writing.
Yep! I really liked this manga but the ending was pretty disappointing (╯°Д °)╯╧╧