Singer-songwriter BOL4 has again taken over the music charts.

As of 8 a.m. on May 14, "Pum," the title track of BOL4's new mini-album "Puberty BookII Butterfly Insight of Flowers," topped the real-time charts of Genie, Bugs and Soribada, and other major charts including Melon.

"Pum" is an attractive song with the witty lyrics of the chorus and points of the melody line wrapped in the ears, with funky rhythm bass and electronic guitar leading the mood of the song.

In addition, "Blank," a song with BOL4's unique cuteness and loveliness, "Counsling," a song about inner feelings that could not be shown frankly, and "Dandelion," a message of consolation and encouragement for all the youth still blooming, all made it to the top of the list, proving BOL4's dignity.

Also, the pre-released song "Leo (feat. BAEKHYUN)," which topped the music charts at the same time as its release on May 7, has been loved and firmly ranked high so far. 

"Puberty BookII Butterfly Insight of Flowers" is the second story of adorable but more brilliant puberty because of its precariousness and anxiety. "Butterfly Insight of Flowers" is a metaphorical expression of joy to meet one's loved ones, and if you portray adolescent growth pains in "Publicy Book 1 Flower Energy," this "Public Book II Butterfly of Flowers" captures every precious emotion in the growing process.

Last year, "Puberty Book1 Flower Energy" received a lot of love by maintaining the top spot on the music charts for all songs, and will continue its momentum even after Ahn Ji-young went solo to continue her successful music career as a BOL4.