Kim Sejeong returns with MBC’s new drama Moon River. A soul-swap fantasy comedy with Kang Tae Oh. Premiering October 31, fans can’t wait for the chaos.
MBC’s upcoming historical fantasy Moon River has sparked a wave of excitement across social media with its first teaser. The drama, set to premiere on October 31, 2025, features Kim Sejeong and Kang Tae Oh in a comedic yet emotional story of soul-swapping between a forgotten crown prince and a witty merchant. The combination of Sejeong’s chameleon-like acting and the playful premise has made fans impatient for its release, and the comments across Instagram, Reddit, and X (Twitter) reveal just how much anticipation is building.
Instagram @mbcdrama_now
A Soul-Swap Comedy That Surprised Fans
The teaser introduces Crown Prince Yi Kang (Kang Tae Oh), who hides behind a mischievous personality despite his royal title, and Park Dal Yi (Kim Sejeong), a bold woman with a sharp tongue who lives as a wandering merchant. After an accident, Dal Yi loses her memory and unexpectedly crosses paths with Yi Kang. A strange phenomenon occurs, forcing their souls to swap bodies. From there, chaos erupts as Dal Yi finds herself inside the crown prince’s body while Yi Kang wakes up in hers.
This premise immediately captured fans’ imaginations, especially when snippets of the trailer began circulating online. Many noted the hilarity of the soul-swap scenario, with one user on X joking:
“the first thing that shocks you in a soul swap is when you realize your gender has changed, LMAO 😭😭😭”
Another viewer wrote on Reddit:
“The teaser is already funny, I really can’t wait to watch it!!! I hope the plot is good until the end because I really like Kim Sejeong 🥰”
The blend of historical setting and modern comedic timing has been particularly praised. Some fans admitted they initially expected a heavy sageuk based on the title, only to be pleasantly surprised when the teaser revealed its comedic tone.
Instagram @mbcdrama_now
Kim Sejeong’s Transformative Charm and Fan Reactions
Beyond the storyline, much of the spotlight has been on Kim Sejeong herself. On September 23, she posted photos and behind-the-scenes clips on Instagram, writing “드디어 첫 개시🤭” (“Finally the first reveal”). Her transformations between royal attire and merchant clothes drew attention, showcasing how seamlessly she can embody contrasting roles. Fans praised her ability to even pull off male disguises, calling her visuals both charismatic and hilarious.
On Reddit, one user commented:
“김세정 강태오 케미 기다립니다” (“Looking forward to the chemistry between Kim Sejeong and Kang Tae Oh”).
Another added simply:
“김세정님 사랑해” (“I love Kim Sejeong”).
The Instagram and X responses were just as enthusiastic. Fans described the teaser as “chaotic couple story energy” and “the couple we didn’t know we needed.”
One fan wrote:
“LOL I just can’t wait! This couple is everything we needed! 😂😍❤️🙌”
Another echoed the anticipation:
“IS THAT A SOUL SWAP GENRE?? THIS SO GOOD CAN’T WAIT.”
The mix of laughter, chaos, and curiosity about how the characters will survive in each other’s bodies has created a lively online buzz. Even casual drama watchers admitted they are drawn to the unusual blend of fantasy and comedy.
With Moon River, MBC seems to be delivering one of its most promising year-end titles. The chemistry between Kim Sejeong and Kang Tae Oh, the playful take on a soul-swap narrative, and the historical setting that contrasts with slapstick humor all hint at a drama designed to capture both domestic and global audiences.
Fans can expect the first broadcast on October 31, 2025, at 9:50 p.m. KST. Until then, the teaser and Sejeong’s behind-the-scenes updates will continue to fuel the excitement online.
Sources: Ten Asia, Soompi, MBC drama YouTube Channel
Kim Sejeong is like a princess in both roles. I can’t wait to see all the pretty scenes and costumes. My heart is fluttering!
But also, can we talk about Sejeong’s visuals? She’s literally an all-rounder idol-actress. Stanning her since I.O.I days! 
The soul swap idea is simple but the cast makes it look so worth watching
She looks stunning and still manages to be so funny at the same time 