Falling for My Wife’s Sister (2026)
Genre: Romance, Comedy, Drama
Starring: Lee Jong-suk, Park Bo-young, Song Hye-kyo

In Falling for My Wife’s Sister, a charming romantic comedy, Ji-ho (Lee Jong-suk) finds himself in the most awkward of situations when he begins to develop feelings for his wife’s older sister, Soo-jin (Song Hye-kyo).

A devoted husband, Ji-ho is taken by surprise when Soo-jin comes to stay with them, and what starts as lighthearted moments quickly evolves into a whirlwind of emotions that he can’t control. As Ji-ho battles his growing attraction to Soo-jin, he must navigate a series of hilarious and often complicated situations, all while keeping his love for his wife, Hye-jin (Park Bo-young), intact.

Amid chaos, misunderstandings, and heartwarming moments, Ji-ho learns the fine line between love, loyalty, and his heart’s desires. Will he be able to resist temptation, or will he have to confront his feelings head-on with life-changing consequences?

Falling for My Wife’s Sister delivers a perfect mix of humor, emotion, and charm. With standout performances from Lee Jong-suk, Park Bo-young, and Song Hye-kyo, this romantic comedy will keep you laughing, crying, and rooting for a love story that’s anything but ordinary.