Mr.Children brings an album in two types as "Drip" and "Naked." This "Naked" type consists of the same contents in the limited edition of "Drip (CD+DVD)" plus a USB album "Naked," a 80-page photo book, a QR code, and liner notes in box packaging. The CD includes 14 tracks total. The DVD features documentary on recording (60 min. approx.). The USB "Naked" includes 14 tracks, which are the same with the CD, plus 9 additional ones each available in MP3 format and High Resolution Audio format (24bit/96KHz). The QR code allows you to access listen sample of demo track(s) (system requirements unknown).