Itsuka no, Ikutsuka no Kimi to no Sekai

 is the fourth single by fhána.

CD

 * 1) Itsuka no, Ikutsuka no Kimi to no Sekai (いつかの、いくつかのきみとのせかい)
 * 2) ARE YOU SLEEPING?
 * 3) Itsuka no, Ikutsuka no Kimi to no Sekai (いつかの、いくつかのきみとのせかい) (Galileo Galilei “dog bass” Remix)
 * 4) Itsuka no, Ikutsuka no Kimi to no Sekai (いつかの、いくつかのきみとのせかい) -Instrumental-
 * 5) ARE YOU SLEEPING? -Instrumental-