Mystic Story's first ever K-Pop girl group Billlie has pre-released a b-side track, "FLOWERLD", ahead of their official debut.

Made up of 6-members including Siyoon, Tsuki, Suhyun, Haram, Sua, and Haruna, Billlie have garnered significant attention since their pre-debut days for the group's well-known trainee lineup. The girls are currently gearing up for their official debut some time in November, but before that, they've decided to treat listeners to a taste of their vocal style and color with a fan song, "FLOWRLD". 

Listeners can also look forward to "FLOWERLD" included as a part of Billlie's upcoming debut album, with more information coming soon!

In the meantime, check out the lyric video for Billlie's "FLOWERLD", above!