As soon as they released their mini-album "Girl's Day Party 1" on July 9, they were caught in controversy because they didn't sing well on their first stage on "Music Bank". Later, they were recognized as a good group. After Jisun and Ji-in left, the new members released their first digital single album, "Girl's Day Party 2". A song from this album, "Nothing Lasts Up", was popular because they not only showed good singing ability but also danced well. 