한 Bolbbalgan4

Bolbbalgan4 (볼빨간사춘기) is a South Korean Girl Group that debuted in 2016.

They are the 9th most streamed artist in Korea.

Before it's official debut, Bolbbalgan4 were 4 students with Jiyoung as vocal. However 2 members left before the debut, thus Bolbbalgan4 debuttedas a duo, with the other member, Jiyoon, mostly playing the guitar and composing. In 2020 she decided to quit and Jiyoung kept the Bolbbalgan4 trademark as a solo act.

Ahn Jiyoung met less success as a soloist, with most Bol4 hits having been released in their time as a duo.