CLASS:y have dropped their latest 'Day&Night' comeback teaser video.

In their newest preview teaser, the CLASS:y members reveal more of their audition journey as well as their upcoming title song "Tick Tick Boom". The girl group's 2nd mini album 'Day&Night' drops on October 26 KST.

Watch CLASS:y's 'Day&Night' preview teaser above, their previous teaser here, and let us know what you think in the comments below.