At the end of last month, rookie girl group CLASS:y announced that they will be making a comeback this month.

Then on October 11 at midnight KST, the girls officially began the countdown to their comeback and released the timetable revealing all the dates of the teasers. According to the timetable chart, the girls will drop the first teaser image on October 12, followed by more teaser images.

Then the girls will drop the album and music video for their 2nd mini-album titled 'Day & Night' on October 26.