The clip, which excludes the behind-the-scenes footage that was also included in the stream, showcases two different charms of the girls, who can pull of amazing heartfelt ballads as well as fun retro dance tracks.

Through the video, you can also hear the ballad version of their title track '2013 What Should I Do', called, '1977 Don't Remember', which is also included in their upcoming mini album.

"2013 What Should I Do?" itself is a dance track that is the work of Shinsadong Tiger and Polar Bear and features sampling of the song that won the traditional University Song Festival back in 1977, Sand Pebbles' "What Should I Do?".

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[Update] - CCM has finally uploaded the MV on their own channel as well, video link has been updated. 

It has also been revealed that despite the different titles in Korean, the agency has gone with the same title in English for both the ballad version and dance version title track. The ballad version '1977 Don't Remember' is referred to as '1977 Do You Know Me?', while the official dance version title track '2013 What Should I Do' is simply 'Do You Know Me?'.