52 EP DramaBox

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

Watch Is It a Sin To Love Your Fiancé’s Brother? on ONShort, with 52 available episodes, from DramaBox. Choose an episode and start watching from the series page.

EPISODES

All episodes

1-52

DETAILS

Series details

Platform: DramaBox
Episodes: 52
Language: English
Last updated: August 13, 2026

STORY

Story of the series

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.