This is part of a 4-type series of “fan discs” released in conjunction with the band's Ooki na Ki no Shita de (大きな木の下で) mini-album. Each disc contains an instrumental version of one of the songs from the mini-album, plus a message track in which one of the members talks about that song. All 4 types feature the same wrap-around jacket design, but the disc designs are all different. This is the vocalist Misuzu (美鈴) type, and the featured song is Komorebi no Shita de (木漏れ陽の下で).