If the Villainess Had Known the Plot in Advance

In a truly excellent melodramatic romance novel, besides the domineering, aloof hero who insists, "I don't care what you think, I decide," the delicate heroine with a tragic past, and the second male lead who loves the heroine and willingly devotes everything to her, there's also... the vicious female antagonist everyone hates, who always gets in the way of the hero and heroine's love.

They're beautiful, and their family backgrounds, abilities, and circumstances are all top-notch. But whenever they meet the hero, they turn into hopeless romantics, driven by jealousy and envy to frame others. In the end, they become completely hysterical and meet a tragic end after witnessing the hero and heroine's happy ending.

But what if the vicious female antagonist learns the plot ahead of time...? Sorry, I'm springing up like a lazy fish. Who cares about the hero and heroine? All of you, get to the back of the line~

Couple summaries:

First world: A pampered, temperamental heiress from a wealthy family X a dark, insecure villain who lost both parents and has to live under someone else's roof

Second world: A very fake, tea-loving prime minister's daughter who cries at the drop of a hat X a cold, ruthless, scheming prince, the male supporting character

Third world: A gifted, arrogant sect leader's eldest daughter, spoiled since childhood X a tragic villainous Demon Lord whom everyone wants dead

Theme: Everyone can change their fate through their own efforts.