It looks like Pentagon gave fans a fun little whistling teaser for their comeback with 11th mini album, 'Thumbs Up'!

In addition to their artwork teaser image released yesterday, Pentagon continued to stick with a playful, 'frog' theme in the whistle teaser clip below. While someone whistles one, simple melody over and over, Pentagon's Wooseok emerges beneath poofy, colorful wigs and a chicken hat. 

More teasers for Pentagon's 'Thumbs Up' coming soon, before their album release on September 10 at 6 PM KST!