At an elite high school known for producing top-ranked students, a group of intelligent girls form close bonds while secretly competing for academic dominance. As rankings, scholarships, and futures hang in the balance, their relationships begin to fracture. Hidden grudges, psychological manipulation, and carefully planned betrayals emerge beneath polite smiles. When shocking incidents start occurring, the line between victim and mastermind becomes blurred. Each character harbors secrets that slowly unravel, revealing how far they are willing to go to win. Friendly Rivalry is not just about grades it is a chilling exploration of power, control, and the mental cost of obsession, where rivalry becomes a weapon and trust turns deadly.
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Several scenes in Friendly Rivalry were reportedly so psychologically intense that they were revised multiple times to meet broadcast standards—yet the final version still became one of the darkest school dramas ever made in Korea, shocking even longtime K-drama viewers.
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