DAY6 unfolds a new chapter of their musical journey! After finishing their "Youth" series last December, DAY6 excitingly reveals their fifth mini-album The Book of Us: Gravity! Apart from the album release, the pop band is also holding the world tour Gravity which begins in Seoul in August and takes them to over 26 cities. DAY6 comes back with six rock jams including title track "Time of Our Life" co-penned by the members and Hong Ji Sang, who produced majority of the band's songs. Young K participated in lyrics and song compositions of all six album tracks, while Jae, Sung Jin and Won Pil took part in most of the songwriting.
This edition comes with an 80-page Soul Version photobook, a random My Page (Soul) Version photo card, a random Our Page Version photo card, a random postcard and a random bookmark.