Ailee, the female singer who debuted in 2012, makes a comeback with her latest single! The designs of the following collectibles vary depending on the version: a photo book (175 x 225mm). It also includes a sequence film (50 x 150mm), a scent paper (90 x 90mm), a sticker (140 x 164mm), a paper for sticker (125 x 125mm), and a photo card randomly selected from two kinds (55 x 85mm). *Package size: 175 x 225mm.