BOL4


BOL4, also known as Bolbbalgan4 or Blushing Youth, is a South Korean musical act formed by Shofar Music in 2016. They appeared on Superstar K6 in 2014 before signing a contract with their current agency. BOL4 was originally a duo consisting of Ahn Ji-young and Woo Ji-yoon. They debuted with the single "Fight Day" from the mini-album Red Ickle on April 22, 2016.
The duo went on a temporary hiatus due to Ahn's music classes requirements in the first half of 2018. BOL4 signed with King Records and debuted in Japan on June 5, 2019, with the mini-album Red Planet .
On April 2, 2020, Shofar Music announced that Woo Ji-yoon had left the duo and that Ahn Ji-young will continue to promote as BOL4. In April 2025, BOL4 parted ways with the agency after 10 years.
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Name

The group's name in English comes from the first syllable of the Korean word [wikt:사춘기|], which is pronounced the same as the Sino-Korean numeral four.

Formation

Ahn Ji-young and Woo Ji-yoon were both raised in Yeongju, North Gyeongsang Province, and were classmates. They had previously competed on Superstar K 6 in 2014. Since they were young, they had dreamed of becoming singers. The name of their duo was chosen because they wanted to make the kind of pure, honest music that can only be found in adolescence. Woo portrays the "blushing" part of the name because she is often shy, while Ahn portrays "youth" because she acts like an adolescent girl.

Members

Current

  • Ahn Ji-young – main vocals

Former

Concert and tours

Headlining concerts and tours

  • BOL4 1st Solo Concert "Red Planet"
  • BOL4 1st Concert in Taipei
  • BOL4 2nd Solo Concert "Imagine"
  • BOL4 3rd Solo Concert "Travel"
  • 2019 BOL4 Spring Solo Concert "Flower Energy"
  • 2019 BOL4 Asia Tour "Blossom"
  • 2019 BOL4 Tour Concert "Two Five"
  • BOL4 Japan Live Tour 2020 "Love"
  • BOL4 Concert "Seoul"
  • 2023 BOL4 Concert in Taipei
  • BOL4 Concert "Love.zip"
  • 2023 BOL4 Asia Tour "Love.zip"
  • 2024 BOL4 Concert "Bloom"
  • 2025 BOL4 Asia Tour "Bloom"

BOL4 Concert "Seoul" (2022)


Showcase

  • BOL4 1st Live Showcase 宇宙をあげる～