hatsune miku graphy collection
『初音ミクぐらふぃコレクション なぞの音楽すい星』
Hatsune Miku Graphy Collection - The Mysterious Music Comet
A card battle game for iOS and Android by Crypton Future Media, featuring Vocaloid characters.
Official Sites
http://www.crypton.co.jp/mikucolle_app/index_pc.php
https://twitter.com/mikucolle