Egao no Riyū./GIRIGIRI

Egao no Riyū./GIRIGIRI (笑顔の理由。／ＧＩＲＩＧＩＲＩ, Egao no Riyū./GIRIGIRI, Lit. Reason for the Smile./Borderline ^?) is a single release by Sonar Pocket containing the 1st opening theme of the World Trigger anime series. The single was released in 4 versions, 2 Limited CD+DVD Editions and 2 Regular CD Only Editions.

Tracklist

Limited Edition A CD Tracklist

1. Egao no Riyū. (笑顔の理由。)
2. GIRIGIRI
3. Egao no Riyū. (instrumental) (笑顔の理由。)
4. GIRIGIRI (instrumental)

Limited Edition A DVD Tracklist

1. Egao no Riyū. Music Video (笑顔の理由。)
2. Egao no Riyū. Music Video Making and Off Shoot (笑顔の理由。 MVメイキング&オフショット)

Limited Edition B CD Tracklist

1. GIRIGIRI
2. Egao no Riyū. (笑顔の理由。)
3. GIRIGIRI (TV size)
4. GIRIGIRI (instrumental)
5. Egao no Riyū. (instrumental) (笑顔の理由。)

Limited Edition B DVD Tracklist

1. GIRIGIRI Music Video
2. GIRIGIRI Music Video Making and Off Shoot (GIRIGIRI MVメイキング&オフショット)

Regular Edition A

1. Egao no Riyū. (笑顔の理由。)
2. GIRIGIRI
3. Tanoshimase Tai!!! (タノシマセ隊！！！)
4. Egao no Riyū. (instrumental) (笑顔の理由。)
5. GIRIGIRI (instrumental)

Regular Edition B

1. GIRIGIRI
2. Egao no Riyū. (笑顔の理由。)
3. Tanoshimase Tai!!! (タノシマセ隊！！！)
4. GIRIGIRI (TV size)
5. GIRIGIRI (instrumental)
6. Egao no Riyū. (instrumental) (笑顔の理由。)