TAITO released the official Soundtrack Album of the period zero smartphone card battle game in Japan. The album available only in digital version for 1500 Yen (with tax) but you can buy only just tracks for 150 Yen (with tax) / track price.

The new OST also includes the official opening song of the game ZELKOKO. You can buy it from the iTunes (link), Mora (link) and the Amazon Japan (link)