MBC's new Friday-Saturday drama "21st Century Great Lady" has released its main teaser video ahead of its premiere on April 10th at 9:40 PM. This drama depicts a romance that transcends social status between Seong Hee-joo, a commoner, and Prince Lee An (Byun Woo-seok), the king's son.

The teaser video features a scene where Seong Hee-joo directly proposes marriage to Prince Lee An. Seong Hee-joo emphasizes her educational background, abilities, toughness, and the fact that as a commoner, there is no interference from royal relatives, appealing herself to him. Prince Lee An accepts her proposal, and their romance officially begins.

Afterwards, Seong Hee-joo and Prince Lee An show their affection by holding hands in public and dancing a waltz at a banquet. However, there are forces opposing their marriage. Prime Minister Min Jung-woo (No Sang-hyun) asks Prince Lee An to keep Seong Hee-joo away from the royal family, and Queen Dowager Yoon Yi-rang (Gong Seung-yeon) urges Min Jung-woo to exercise his right to reject the marriage.

The teaser foreshadows the process of Seong Hee-joo and Prince Lee An choosing marriage to overcome their respective fates, and the conflict between Min Jung-woo and Yoon Yi-rang who try to prevent their union. Despite opposition from the administration and the royal family, attention is focused on whether the two protagonists will succeed in their marriage.

Even before its broadcast, "21st Century Great Lady" ranked first in community and second in SNS in the FUNdex popularity rankings for the third week of March 2026, announced by Good Data Corporation, placing second overall in the TV-OTT drama category. The drama is set in the 21st-century constitutional monarchy of South Korea and portrays a romance of fate between a woman who is a chaebol but of commoner status and a man who is the king's son but has nothing. The first episode will air on April 10th at 9:40 PM.