Hong Jun Seop, known professionally as Bily Acoustie, is a South Korean singer-songwriter. He graduated from Dong-Ah University of Broadcasting and Arts and made his debut in 2011 as a member of the band Moon Patrol, which disbanded in 2014. He made his solo debut in 2013 with the single album "I Want to Rest" but, despite released music since then, he has remained a somewhat obscure singer, preferring song festivals or other public events instead of appearing on TV. He is widely recognized for his great composition and lyric writing as well as his vocal and guitar skills. He has collaborated extensively with many singers writing songs for Roy Kim and Baek A Yeon and featuring in songs by EB, ASTRO's San Ha, among others. He has sung several OSTs for dramas such as "Plus Nine Boys" (2014), "The Miracle We Meet" (2018), "Behind Every Star" (2022), "Bo Ra! Deborah" (2023), and more.

(Source: Korean = Namu Wiki || Translation = kisskh) Edit Biography