Billlie unveiled new teasers for their upcoming summer single "track by YOON: Patbingsu".

On July 10 at midnight KST, the girls of Billlie continued dropping classic posters reminding many of the commercials that took place back in the early 2000s. 

Meanwhile, "track by YOON: Patbingsu", a collaboration project between Billlie and Mystic Story's producer/singer Yoon Jong Shin, will be on July 14 at 6 PM KST.