2+ characters

Is It a Sin To Love Your Fiancé's Brother?

Live-action or AI/ANIME?

Is It a Sin To Love Your Fiancé's Brother?

Titles by platform

DramaBoxIs It a Sin To Love Your Fiancé's Brother?

ReelShort약혼자의 동생을 사랑한 게 죄일까요?

Lezhin SnackIs It a Sin to Love Your Fiancé’s Brother?

2026·52 Eps·Free 9 Eps

Synopsis

Overnight, she fell from "Nation's Sweetheart" to "Nation's Cheater". A photo of her kissing her fiance's cousin, top actor Min Su-ho, ruins everything. But the scandal is fake—part of a revenge plot. Since they call me a cheater, let's act like one. A dangerous fake affair revenge begins.

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Is It a Sin To Love Your Fiancé's Brother? ReelShort — ReelShort

Is It a Sin To Love Your Fiancé's Brother? DramaBox — DramaBox

Is It a Sin To Love Your Fiancé's Brother? Lezhin Snack — Lezhin Snack

Where to watch

DramaBox WATCH NOW

ReelShort WATCH NOW

“Is It a Sin To Love Your Fiancé's Brother?” (52 EPS) is available on DramaBox · ReelShort · Lezhin Snack. Checked 2026-09-09.

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Ratings & Reviews

Latest reviews›

You Are My Antidote

You Are My Antidote

soggywaffle22

Episode 1 might make you go "what IS this lunatic" and bail. He's my favorite short-drama actor and even I hesitated. Please stay with it!! The acting is unreal, the way his eyes go, the way he smiles, each one gets me >_<

You Are My Antidote

You Are My Antidote

mina.07

My favorite of his modern-set work and honestly my favorite short drama full stop. You get the complete unhinged-psycho performance, and I'd say his acting leveled up here. If you're working through his filmography, this is the one.

She’s the Flower in His Desert

She’s the Flower in His Desert

qwertea

The plot is hard to follow and never really comes together. With all the flashbacks and dream sequences, the pacing has no tension at all…

Details

Where to watchReelShort · DramaBox · Lezhin Snack

GenresRomance

TypeLive-action

Release dateMay 15, 2026

Episodes52 episodes

Free episodes9 ( ReelShort · DramaBox )

Total runtime1 hr 13 min

Episode runtime (avg.)1 min 24 sec

Subtitles

3 platforms · 4 languages

ReelShort한국어DramaBoxEnglish · 한국어Lezhin SnackEnglish · 한국어 · 日本語 · 中文

DirectorPark Sungkwang

WriterPark Somi

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