How a 19th-century Joseon romance triggered a modern-day cultural phenomenon in South Korea
In short: The 2016 television series Love in the Moonlight became a massive cultural touchstone, sparking a phenomenon dubbed Moonlight Syndrome. Beyond its record-breaking ratings and viral marketing, the show transformed from a web novel into a sprawling franchise, influencing everything from digital stickers and mobile games to international tourism and fashion.
Based on the web novel by Yoon Yi-soo, Love in the Moonlight tells the coming-of-age story of Crown Prince Lee Yeong and his unlikely bond with Hong Ra-on, a woman disguising herself as a male eunuch. The series, which aired on KBS2 from August 22 to October 18, 2016, was praised for its production quality and emotional resonance. Director Kim Seong-yoon intentionally avoided heavy political metaphors, focusing instead on a charming, relatable romance that resonated deeply with contemporary audiences.
The show's impact was immediate and measurable. It achieved a peak audience rating of 23.3% and remained the top-rated drama in its timeslot, becoming KBS's highest-rated Monday/Tuesday series since 2010. This success, termed Moonlight Syndrome, saw lead actor Park Bo-gum dominate topicality charts for nine consecutive weeks. The series' influence extended well beyond the screen; sales of the original novel jumped by 56%, and the production spawned a best-selling photo essay book, official merchandise, and even a musical adaptation.
The production's reach was global, aided by international streaming on platforms like Netflix and Viki. Its cultural footprint was solidified by viral moments, such as the lead actor's teaser dance in front of Gwanghwamun, and a fan-signing event at the same palace that drew over 5,000 attendees. Even after the 18-episode run concluded, the show's legacy persisted through special broadcasts, a two-disc soundtrack, and exhibitions of its elaborate Joseon-era costumes, cementing its status as a landmark in historical K-drama.
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Sources
- Summary by Intellect · source: Love in the Moonlight
- Also: Wikidata — Love in the Moonlight · CC0
- Also: Wikidata — Love in the Moonlight (2025) · CC0
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