I Became My Idol’s Sister, So I’ll Be a Villainess to Keep My Brother.

Synopsis

Nagisa dies while obsessing over Neun, the charming villain from her favorite novel, only to awaken as his younger sister Frau in that very world. Determined to monopolize his affection and prevent any romantic rivals from succeeding, she embraces her role as an antagonist and systematically sabotages every potential love interest who crosses his path.

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