Ai Otsuka
The film's theme song, "Ren'ai Shashin" (Love Photo), is a ballad sung by Ai Otsuka. The title of the movie was taken from the lyrics of the song. The single was released by Ai Otsuka on October 25, 2006. In its first week of sales, the single debuted at number 2, being Otsuka's highest debut sales of the year with 77,570 copies sold. The song also won the "Best Video From A Film" and "Best Pop Video" awards at the MTV Video Music Awards Japan 2007.