Where can I find Kokia's "Grandfather's ship" (song) ?

[Mari-chan]

Hi there,

I hope, I'm right here, to aks that question... but, I wonder, if someone know, where I can find Kokia's song "Grandfather's ship".
It was from the same named Mini-Movie. Was it on a album? On which Album can I found it? Or was it the B-side of a single. Did someone know it?
Thanks.

Mari!