The premise of Love in Disguise fits in one sentence, and that sentence is the whole problem. A detective goes undercover as a man to guard a murder suspect. She has also been assigned to investigate him. He thinks his new bodyguard is a man, and he starts feeling something anyway.
Prime Video announced the series on 4 September 2026. The Korean drama stars Yim Si-wan and Seorina, and it premieres on 19 October 2026 exclusively on Prime Video in Singapore and more than 240 countries and territories worldwide. Nobody sits in a regional waiting room this time.
The streamer calls it a blend of romance, comedy, and thrills: “a captivating game of disguise and desire, where a dangerous investigation blurs the line between duty and love”. Translated out of corporate: everyone here is lying to someone, and one of them might be a killer.
The Coffee Prince Blueprint, With Murder
Anyone who came up on Coffee Prince in 2007 or You’re Beautiful in 2009 knows this shape by heart. A woman passes as a man for practical reasons. A man falls for her while believing she is a man, then spends roughly six episodes quietly unravelling over what that says about him. Usually while staring at a wall.
Love in Disguise adds a cost beyond embarrassment. The man on the other end of the misunderstanding is a murder suspect. The woman keeping the secret is police, so every scene that used to play for laughs now has a second job: she is collecting evidence on the man she is falling for.
That changes what the disguise protects. In Coffee Prince, it guards a job and a crush. Here it is the only thing keeping a detective inside the house of a man her department thinks committed murder. Same house, same man, the same nights she is meant to be guarding him.
Yim Si-wan Just Played a Sociopath
The casting will do the heavy lifting in group chats. Yim Si-wan spent back-to-back seasons of Squid Game as Lee Myung-gi. A review on the World Socialist Web Site summed the character up as a “despondent sociopath”, and the performance was never built to make anyone want to be near him.
Now he is the suspect at the centre of a romance, playing distrust and attraction in the same scene. His CV supports the swing: Run On was clean-cut romance, Emergency Declaration was ensemble disaster, and Unlocked was a cat-and-mouse thriller.
Seorina has the harder half. She is playing a woman playing a man playing a bodyguard, convincing enough that the suspect never clocks it while the audience spots every tell.
8.15 Million Views, Zero Episodes
The source is the web novel Why Don’t You Know It’s a Girl?, which has pulled more than 8.15 million views on Kakao Webtoon. That number is why the announcement lands with weight instead of arriving as another logline. A readership that size shows up with opinions about pacing, and about exactly when the truth should land.
The title is a dare. It keeps the reader permanently ahead of the male lead, so 8.15 million people have already decided how long he should plausibly stay in the dark. Move that moment and the fandom will have the receipts within an hour of the episode dropping.
The production carries tvN branding alongside Prime Video‘s. Every press still comes from that script reading: teal booklets, name placards, everyone still seated. Early days, then. The cast has been in a room together, and that room has been photographed.
One Date, 240 Countries, No Waiting
Simultaneous release counts for more than it sounds. Korean dramas have historically reached Singapore on a licensing delay, which means the discourse happens elsewhere first and arrives pre-spoiled. Anyone who has built a long weekend around a couch and a K-drama queue knows that feeling.
This one lands here on 19 October at the same hour it lands everywhere else. For a story built on a secret, that is the difference between watching it and reading about it. The reveal only works once.
🗓️ Date: Monday, 19 October 2026
📺 Where to Watch: Prime Video, in Singapore and more than 240 countries and territories worldwide
🎭 Cast: Yim Si-wan and Seorina
📖 Based On: Why Don’t You Know It’s a Girl?, the web novel with over 8.15 million views on Kakao Webtoon
🎬 Genre: Korean romance, comedy, and thriller
Block out that Monday now, because a single screenshot on the timeline undoes the whole premise. Set the reminder, keep the notifications off until the credits roll, and watch it on Prime Video the day it drops. First footage and episode details are rolling out on Prime Video’s own channels ahead of 19 October, and that is where the trailer will land before anyone else gets to describe it to you.
Visuals courtesy of Prime Video.
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