Egao no Riyuu. / GIRIGIRI

 (笑顔の理由. /GIRIGIRI) is the 18th single released by Sonar Pocket.

Single Information
GIRIGIRI was used as the first opening theme for the anime World Trigger.

CD

 * 1) Egao no Riyuu. (笑顔の理由. )
 * 2) GIRIGIRI
 * 3) Tanoshimase-tai!!! (タノシマセ隊!!!) (Regular Edition A/B Only)
 * 4) GIRIGIRI (TV size) (Limited Edition B / Regular Edition B Only)
 * 5) Egao no Riyuu. (笑顔の理由. ) (Instrumental)
 * 6) GIRIGIRI (Instrumental)

Limited Edition A DVD

 * 1) Egao no Riyuu. (笑顔の理由. ) (MV)
 * 2) Egao no Riyuu. (笑顔の理由. ) (MV Making&Off-shot)

Limited Edition B DVD

 * 1) GIRIGIRI (MV)
 * 2) GIRIGIRI (MV Making&Off-shot)

Featured Members

 * ko-dai
 * eyeron
 * matty