
Byeon Woo-seok, who is currently stealing the spotlight in ’21st Century Grand Prince’s Wife’, is returning with an emotional OST. This comes two years after he took the world by storm as Ryu Sun-jae in tvN’s ‘Lovely Runner’, where he showcased his vocals as a member of the group Eclipse with the hit song ‘Sudden Shower’.
Kakao Entertainment announced that ‘Parallel Line’, Part 11 of the OST for the MBC Friday-Saturday drama ’21st Century Grand Prince’s Wife’, will be released on various online music platforms on May 15 at 6 PM. Sung by Byeon Woo-seok himself, who plays the role of Grand Prince Ian, this is the final OST that captures the emotional arc of the drama’s final chapters.

‘Parallel Line’, released just before the drama’s finale, is an emotional ballad that explores the relationship between two characters who have lived completely different lives. As the title suggests, the song describes the journey of two people who seemed like parallel lines, never to meet, finally drawing closer to one another. Byeon Woo-seok’s calm vocals blend perfectly with a lyrical piano-driven melody. Having portrayed a heartbreaking emotional line throughout the series, Byeon Woo-seok uses his voice to express the character’s deep feelings and inner turmoil with a clean and sincere singing style.
A snippet of ‘Parallel Line’ was previously revealed during the ending of episode 10. It played during a poignant scene where Seong Hee-joo (played by IU) and Grand Prince Ian reaffirm their true feelings after their contract marriage is exposed, followed by a high-tension sequence where Grand Prince Ian faces danger in a fire. Following the broadcast, fans flooded SNS and online communities with requests for the official release of the track.
The OST for ’21st Century Grand Prince’s Wife’ has featured a stellar lineup of K-pop artists, including WOODZ, RIIZE, BIBI, Sam Kim, Hanroro, and KiiiKiii. Various tracks have been used to support the drama’s romantic and conflict-ridden moments.
’21st Century Grand Prince’s Wife’ is a romance drama set in a fictional version of 21st-century South Korea under a constitutional monarchy. Fans are eagerly waiting to see how the contract marriage between Seong Hee-joo and Grand Prince Ian concludes. Episode 11 will air on May 15 at 9:50 PM, and the final episode will air on May 16 at 9:40 PM.



