DAY6 5th Mini Album - The Book of Us : Gravity

- CD(Random ver / 157 x 212mm)
- Photobook(80p)
- Photocard(Random 2 out of 40)
- Postcard(Random 1 out of 5)
- Bookmark(Random 1 out of 5)
- Film Photocard(Random 1 out of 5 / 1st Press Only)
- Poster(Random 1 out of 7 / 1st Press Only)