Single from AI. The title song is the main theme song for the TV drama series "Yako Kanransha" originally written by Kanae Minato of "Confessions." B-side song is "FOR YOU." This edition includes a bonus DVD including two music videos "Happiness - Smile Version -" and "VOICE." *The DVD disc is encoded for region 2 (Japan, Europe, and Middle East), and no subtitles are included.