BUMP OF CHICKEN will digitally release their new song "Small world" on November 1.

As previously reported, "Small world" is the theme song for 'Sumikkogurashi The Movie: Aoi Tsukiyo no Mahou no Ko' that's scheduled to open in theaters on November 5. This song was revealed in its entirety during a pre-screening event for the movie on October 22. To coincide with the song's release, its jacket artwork designed by VERDY has also been revealed (as seen below).