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Chaebol Heiress IU Proposes to Royalty in “The Grand Prince of the 21st Century”; Byun Woo-seok’s Character Finds It “Irresistible”

Photo = Screenshot from the teaser video of MBC's new Friday-Saturday drama 'The Grand Prince of the 21st Century'

IU and Byun Woo-seok, starring in “The Grand Prince of the 21st Century,” are set to captivate 21st-century Korea with their undeniable charm.

MBC’s new Friday-Saturday drama “The Grand Prince of the 21st Century” premieres on April 10. Its main teaser introduces the beginning of a romance that transcends social status between Sung Hee-joo (played by IU) and Yi An Dae-gun (Byun Woo-seok).

The teaser opens with Sung Hee-joo boldly proposing to Yi An Dae-gun with a confident smile, asking, “Won’t you marry me?”

Sung Hee-joo, a woman with education, courage, and ability who also lacks political ties due to her commoner status, boldly asserts herself. Yi An Dae-gun responds, “It’s irresistible,” and accepts her proposal.

MBC 'The Grand Prince of the 21st Century' teaser

Following Yi An Dae-gun’s command, “Prepare to become the Grand Princess,” Sung Hee-joo and Yi An Dae-gun spend romantic moments together.

As they confidently walk hand in hand under the spotlight and share a waltz at a banquet, they enjoy the attention and exude a romantic atmosphere.

However, tensions rise as forces emerge to oppose their marriage.

Prime Minister Min Jung-woo (No Sang-hyun) pleads with Yi An Dae-gun to distance Sung Hee-joo from the royal family, while Queen Dowager Yoon Yi-rang (Gong Seung-yeon) urges Min to veto their marriage.

With both Min Jung-woo and Yoon Yi-rang wielding significant power in politics and the royal court, their opposition suggests a challenging journey ahead for the couple. Nevertheless, Sung Hee-joo and Yi An Dae-gun’s faces reveal a newfound excitement.

'The Grand Prince of the 21st Century' IU, Byun Woo-seok, Gong Seung-yeon, No Sang-hyun

Despite the opposition, anticipation builds for the chemistry between Sung Hee-joo and Yi An Dae-gun.

The main teaser for “The Grand Prince of the 21st Century” hints at the inevitable conflict between Sung Hee-joo and Yi An Dae-gun, who choose marriage as a means to overcome their destinies, and their opponents Min Jung-woo and Yoon Yi-rang.

Amidst governmental and royal opposition, the successful marriage of Sung Hee-joo and Yi An Dae-gun remains uncertain.

Meanwhile, “The Grand Prince of the 21st Century” has already become a hot topic prior to its premiere. According to Good Data Corporation’s FUNdex, it ranked first in community responses and second on social media in the TV-OTT drama section for the third week of March 2026.

Set in a constitutional monarchy in 21st-century Korea, the drama “The Grand Prince of the 21st Century” tells the story of a chaebol who has everything but is frustrated by her commoner status, and a prince who, despite his royal lineage, possesses nothing. It explores a romance that defies status and airs on Friday, April 10, at 9:40 PM.

Photo courtesy of MBC

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