A fanlisting is simply an online listing of fans of a subject, such as a TV show, actor, or musician, that is created by an individual and open for fans from around the world to join. There are no costs, and the only requirements to join a fanlisting are your name and country.
(Source: TheFanlistings.org)
According to Wikipedia... "BUT" / "Aishou" is Kumi Koda's 35th single and was released on March 14, 2007. It was her first single of 2007. The single is a time limited purchase[clarification needed] and can be purchased in any method from March 2007 to May 2007. and "Aisho", meaning "love proof", is a love ballad. BUT is also the theme song for the Japanese edition of the movie, Step Up.
There was also an analog version of BUT, set for release the week after this single's.