Secret Door poster
FilmRomance

Secret Door (2025)

Original title: 비밀의 문

2025-12-04 · 1h 14m · KO
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Ham Jae-kyeong, a successful adult web novel writer, suddenly finds herself in a slump. She rewrites her writing and characters keep overlapping. Se-hee, the CEO of a web novel company, is Jae-kyeong’s friend. Se-hee suggests to Jae-kyeong that she write a SM novel as a way to overcome her slump. At first, she refuses, but after being persuaded by her assistant writer, Gi-dong, she meets Seong-soo, who enjoys SM play. Jae-kyeong is drawn to the handsome and well-mannered Seong-soo. Is he researching for her novel or is he in a relationship? Growing increasingly captivated by Seong-soo’s charm, she begins to embrace SM play.

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Lee Dong-hyunDirector

Top billed cast

Full cast & crew →
Oh Ji-yoonOh Ji-yoonJang Tae-gyeomJang Tae-gyeomKim Dan-ahKim Dan-ahKim Se-heeSeung HaSeung Ha

Movie DNA

Genre affinityRomanceMood preferenceRomancePacingShortEmotional intensityRomanceDirector preference436451Actor preference1967114 · 1967115 · 1967116

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Frequently asked questions about Secret Door

What is Secret Door about?

Ham Jae-kyeong, a successful adult web novel writer, suddenly finds herself in a slump. She rewrites her writing and characters keep overlapping. Se-hee, the CEO of a web novel company, is Jae-kyeong’s friend. Se-hee suggests to Jae-kyeong that she write a SM novel as a way to overcome her slump. At first, she refuses, but after being persuaded by her assistant writer, Gi-dong, she meets Seong-soo, who enjoys SM play. Jae-kyeong is drawn to the handsome and well-mannered Seong-soo. Is he researching for her novel or is he in a relationship? Growing increasingly captivated by Seong-soo’s charm, she begins to embrace SM play.

How long is Secret Door?

Secret Door has a runtime of 74 minutes.