Compilation album from Ai Otsuka includes her singing with a piano at concerts. Tracks are selected in fan balloting (ten tracks in total). Limited edition comes with a piano score (Type A). *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.