The Villainess Stans the Heroes. Playing the Antagonist to Support Her Faves!, Vol. 1

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What's a girl to do when she's reincarnated into a game full of her biases, and as the antagonist to boot? Simple--do whatever it takes to make them shine, of course! When I'm reborn into the body of the villainess Eldia, I'm determined to play my role to perfection for the loves of my life...but how was I supposed to know that one impulsive mistake I made years ago would bring such drastic changes to the story!?