[3][4] The single album recorded the highest number of copies sold on the first day of sales out of all Korean girl groups who debuted in Japan.

[5] On December 22, 2017, Twice announced the release of their second Japanese single titled "Candy Pop", along with several teaser images for the new track.

[3][6] A sneak peek of its B-side track titled "Brand New Girl" was also released the same day, as it was selected as the commercial music for Line's Clova Friends smart speaker.

"Candy Pop" and "Brand New Girl" were also digitally released on various South Korean music sites the same day.

[13] It features the nine members as cartoon singers in a candy-coated realm, filming on set of a music video that a human girl is watching.

It recorded the highest number of copies sold on the first day of sales out of all Korean girl groups who debuted in Japan.