Rainy.'s second album release! This album includes 11 songs: ten tracks released in the two and a half years since the first album in June 2023, plus a new song written for this release. Seven of the songs are tie-up works created through various collaborations between Rainy. and drama, games, sports, manga, anime, and magazines. By producing songs tailored to each collaboration, Rainy. has continually challenged and discovered new aspects as a singer and performer. This important second album was created together with everyone involved in the songs. The new song "Rainbow," themed around Rainy. and Sunny. (the name of her fans), is a medium-tempo number with lyrics written by Rainy. with her staff to express gratitude to Sunny. The Regular Edition includes a QR code that provides access to behind-the-scenes and interview footage taken during the jacket photo shoot. *This product can be played by downloading the dedicated application and reading a QR code (system requirements unknown).