The costumes were designed by Gu Donghyun on the OnStyle show, Fashion Killa.

On November 18, concept photos were released that showed the members wearing Christmas tree themed outfits.

After these images were released, Crayon Pop was accused of copying the Christmas tree outfit of Momoka Ariyasu, a member of Japanese girl group Momoiro Clover Z.

Crayon Pop's Christmas tree outfit is simply for the concept photo, not for the stage performances.

"[5] After the song was released, it received plagiarism accusations because the introduction sounded similar to the opening theme for the Japanese anime Lupin the Third.