A vocal best album commemorating ruha's 10th anniversary, with all tracks sung, written, arranged, and illustrated by ruha herself.The album is composed of a wide range of genres including electronica, digital rock, and Japanese style songs, with fantasy elements such as ethnic pops, narrative music, and multiple choruses as the main elements.The album also includes a number of new songs newly written to mark this milestone, including songs for which listeners voted on song themes, songs for which choruses were solicited from the public, and a message song that expresses the artist's thoughts on her activities.