Regret nothing ~Tighten Up~

Regret Nothing ~Tighten Up~ is the theme song of Kamen Rider OOO Tatoba Combo and one of the ending themes of Kamen Rider OOO
 * Lyrics: Shoko Fujibayashi
 * Composition & Arrangement: Shuhei Naruse
 * Artist: Eiji Hino(Shu Watanabe)
 * Episodes: 5, 7, 13

Lyrics
to be added