It looks like the title of CLASS:y's 1st mini album Y, 'Class Is Over', had a very different meaning from its common use!

In the first MV teaser for CLASS:y's upcoming debut title track "Shut Down", 7 classmates find themselves caught up in the middle of a zombie apocalypse. The classrooms are destroyed, the halls are overrun with former classmates who have turned into zombies, and the CLASS:y members are in trouble!

Born from MBC's girl group survival program 'My Teenage Girl', the 7-member rookie girl group CLASS:y is set to debut with the release of their 1st mini album Y, 'Class Is Over', on May 5 at 6 PM KST. Stay tuned to find out what happens to the girls of CLASS:y in their debut MV, coming next week!