BE:FIRST's new single "Sora" is written and composed by SKY-HI. It also features the B-side song "BLUE." Compatible with "Sumapura". *This is a "Sumapura Music" compatible product, which enables you to listen to and view the contents on a mobile device in addition to CD players. "Recommended System Requirements" iOS7/Android4.0 or later. *This service expires two years after the release date. "Important Notes for 'Sumapura Music' & 'Sumapura Movie' compatible product" No refund is possible after this product is sent. The record company has designed and optimized "Sumapura Music" & "Sumapura Movie" for the market within Japan and registration at "Sumapura" site, available only in Japanese language, is required. They do not guarantee that it works outside of Japan.