Koi no Himitsu

 is a single by pua:re.

CD

 * 1) Koi no Himitsu (恋のヒミツ)
 * 2) Ai Kotoba (あいことば)
 * 3) Koi no Himitsu (恋のヒミツ) (Instrumental)
 * 4) Ai Kotoba (あいことば) (Instrumental)

Limited Edition DVD

 * 1) Koi no Himitsu (Music Video)
 * pua:re Private Video & Making