Mystic Story's first official K-Pop girl group Billlie appeared as guests on the July 15 broadcast of KBS2's 'Yoo Hee Yeol's Sketchbook', accompanied by the label's head producer, Yoon Jong Shin!

On this day, Billlie opened up their stage by performing their new single "Patbingsu", a remake of Yoon Jong Shin's 2001 hit song of the same name. The girls were joined by a furry snowman on stage, who turned out to be singer/producer Yoon Jong Shin!

During their interview with MC Yoo Hee Yeol, Billlie took turns introducing themselves one by one for viewers, and also sang a cover of another Yoon Jong Shin hit, "You're Different". 

Catch a recap of this week's 'Sketchbook' with guests Billlie and Yoon Jong Shin, above and below!