Byeon Woo Seok's "Parallel Lines" from the Drama '21st Century Grand Princess' OST: Lyrics and Music Video

Actor Byeon Woo Seok is gaining attention for directly singing "Parallel Lines," Part 11 of the OST for the MBC Friday-Saturday drama '21st Century Grand Princess.' Having risen to stardom with his role as Ryu Sun Jae in the 2024 drama 'Lovely Runner,' where he showcased his singing abilities, Byeon Woo Seok's participation in this OST is once again drawing significant anticipation from fans.

"Parallel Lines," released on May 15, 2026, is an emotional ballad that portrays the destined love between the main characters, Grand Prince Ian (Byeon Woo Seok) and Seong Hee Ju (IU), in the drama '21st Century Grand Princess.' It begins with ethereal and lyrical piano melodies, gradually building emotional intensity, conveyed through Byeon Woo Seok's warm and clear voice. The song garnered significant attention when it was featured in the 10th episode's ending, singing about the fate of two protagonists from different lives eventually converging.

Bloggers have praised "Parallel Lines" for delicately portraying the drama's narrative and providing deep immersion. Lyrics such as "We were far apart like parallel lines" and "I always revolved around you, no matter the day, no matter the time, because it was always you" effectively convey the characters' emotions, with many noting that Byeon Woo Seok's vocals enhance the song's emotional impact.