Girl group SATURDAY is showing off its five-member five-color charm, which is bound to be "BByong" and addictive.

On September 10 and 11, the third single "I Know You Know" concept teaser and photo teaser were released on the SATURDAY official SNS channel.

In the image, SATURDAY exudes its own charm, from its chic appearance to its fresh, bright side. Sky and main characters, Yuki, Zinc, and Minseo, who boast colorful styles, are also emphasizing their colorful, bright-colored looks.

SATURDAY, which is unveiling a variety of content with news of its comeback, will showcase the addictive cute charm "BByong" through "WiFi

SATURDAY's "BByong" will be released on various music sites at 6 p.m. on Sept. 19.

SATURDAY also plans to hold preorders for the album until Sept. 19 and give out invitations to the showcase to be held on Tuesday afternoon through a raffle.