It was used as the theme song for Tegami, a film starring Takayuki Yamada, Tetsuji Tamayama, and Erika Sawajiri.

[2] The title song is described by CDJapan as "a ballad perfect for the love story in the film",[3] and came with a special, limited letter from Hitomi.

The coupling track on the single, "DRIVE", was labeled as "special", because of the many different other artists who worked on the song.

Sample of the translated lyrics:[5] The music video for Ko·mo·re·bi aired for the public on MTV "M-SIZE" on October 23, 2006.

She then proceeds to place headphones on, and begins singing into a microphone with a stand holding the lyrics of the song in front of her.