The girls promoted "Something" 6 months ago, a song also by Duble Sidekick. Since "Something" was such a big hit, they're hoping to see the same chemistry again.

The label added, "The album will be a mini album. It's not only a 4th anniversary album, but also a summer special album, and it'll be full of bright, lively music. Girl's Day is also preparing a special event with this album release so they can give the love back to their fans."