BOL4

BOL4 is active as of 2026-11-15.

The Korean name Bolbbalgan Sachungi, meaning "blushing puberty," was chosen to express a wish to make music as honest and pure as adolescence. In the English name BOL4, the number 4 stands for "sa," the first syllable of "sachungi," which sounds the same as the Korean word for four. The name itself captures a fresh, youthful feeling.

BOL4 debuted on April 22, 2016, with "Fight Day" from the mini album Red Ickle. From the very start, the act drew attention for its acoustic sound and clear, bright vocals. A full-length album released later that same year introduced the name to a much wider audience.

BOL4 is currently a one-person act, with Ahn Ji-young carrying on under the group name. The project has continued in this solo format since 2020, with Ahn leading both the songwriting and the stage. For the latest activities, BOL4's official channels are the most accurate source.

BOL4 first appeared before the public on Mnet's audition show Superstar K6 in 2014. The act officially debuted in 2016, and "Galaxy," released that same year, became a big hit that made the name widely known. The fresh, youthful feeling shown on the audition stage was the starting point.

Starting with "Galaxy" in 2016, the best-known songs include "Some" from 2017, "Travel" from 2018 and "Workaholic" from 2019. Many of the lyrics honestly capture crushes and everyday moments, so listeners of all ages enjoy them. They are easy to pick from depending on the season or your mood.

BOL4's music is described as based on indie pop and folk. Its signature elements are acoustic guitar, clear vocals and honest lyrics, with a mix of bright tracks and more emotional songs. Stories about the excitement and worries of growing up sit at the heart of the music.

Yes. EXO's Baekhyun featured on "Leo," a track from the 2020 mini album Puberty Book II Pum. The song drew attention for the way the two voices blended together. Information on other collaborations can be found in the album details on BOL4's official channels.

BOL4's first full-length album is Full Album RED PLANET, released in 2016. It contains the title track "Galaxy" and is regarded as the record that made the act widely known. If you want to feel the bright, fresh mood of BOL4's early days all at once, this album is a good place to begin.

If you are new, start with the widely known "Galaxy," then listen to "Some" and "Travel." After that, try "Workaholic" and "Leo" to follow the shift from the early fresh mood to later, more varied colors. Don't forget the debut song "Fight Day" as well.

The most accurate way to learn about BOL4's concerts and TV appearances is through announcements on its official channels. Because the music centers on acoustic sound, its charm comes through especially well in concerts and live performances. Please buy tickets only from official vendors and avoid scalped tickets and unauthorized filming.