Red Velvet's first full-length album of all original Japanese songs. Out of the 11 songs, five new songs including the lead song "WILDSIDE" are included. Comes with a bonus DVD including excerpts from the premium event "Red Velvet "Reveluv-Baby Party 2019" held in 2019. In addition, the DVD contains a lot of contents that are a must-see for fans, such as live footage from a-nation and their past activities in Japan, as well as making-of footage from the cover photo shoot that was shot for this album. Box packaging. A photobook (36 pages), a trading cards randomly selected from six kinds, and application serial number (valid only in Japan) are enclosed. Cover artwork is different from the other limited edition's. *This is a "Sumapura Music" & "Sumapura Movie" compatible product, which enables you to listen to and view the contents on a mobile device in addition to CD and DVD 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.