A new teaser for the upcoming drama “Moon River“ shows stars Kang Tae Oh and Kim Se Jeong in a state of panic after their characters’ souls are mysteriously swapped overnight. The fantasy romance historical drama is set to premiere on October 31 on MBC .
The released teaser introduces the starkly different personalities of Crown Prince Yi Kang, played by Kang Tae Oh, and Park Dal Yi, a bold merchant played by Kim Se Jeong. The crown prince is shown as a mischievous troublemaker, while Park Dal Yi has a fiery temper and lives freely. The plot twists when, after an accident, Park Dal Yi loses her memory and wakes up living as a peasant. Their encounter one night leads to a bizarre body swap, throwing both of their lives into chaos .
Teaser Shows Chaos of Body Swap
The core of the teaser focuses on the confusion that follows the supernatural event. The crown prince and the merchant struggle to adapt to their new bodies. In one scene, Park Dal Yi’s soul inside the crown prince’s body recoils in shock, exclaiming, “What have you done to me?” . The situation is equally bewildering for Yi Kang, who finds himself in a body that is not his own .
A popular social media post highlighted the immediate shock of the gender swap, imagining the characters’ first thoughts: “lee kang in dali’s body: ‘where’s ‘this’?!’ dali in lee kang’s body: ‘what is ‘this’?!” . This comedic take on a classic trope suggests the show will blend fantasy with humor as the two navigate their unexpected situation.
Posters Hint at a Playful Dynamic
Alongside the teaser, the drama released character posters that visually represent the unique connection between the two leads. One poster shows a grumpy Crown Prince Yi Kang holding Park Dal Yi like a paper doll . Another features Park Dal Yi dressed in the crown prince’s robes, smiling mischievously as she holds a miniature version of Yi Kang, who is now in her place as a merchant .
A special poster features an artistic design with Yi Kang perched on top of Park Dal Yi’s traditional woven hat. The tagline on the posters, “A chaotic, soul-swapping romance between complete opposites,” confirms the playful and comedic tone of the series .

Kim Se Jeong’s First Historical Drama Role
“Moon River” is a significant project for Kim Se Jeong, as it marks her first role in a historical drama since her debut in 2016 . She plays Park Dal Yi, a peddler who has lost her memory . Kang Tae Oh plays Crown Prince Yi Kang, who is described as having lost his smile .
The drama brings together two actors known for their reliable performances in romantic comedies, building anticipation for their on-screen chemistry. The series is directed to premiere on October 31 at 9:50 p.m. KST on MBC .
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