"「十二劫紙談」の予定か３００超えました！お礼の絵です！ / これは女子組ですww / 男性組(illust/3938161) / 壁紙配布http://kaynn.blog.shinobi.jp/Entry/9/（中國語）" - kaninn

This is gonna be fun to tag.

Pretty sure I recognize Hatsune Miku and... Rin? Kagamine or however the hell you spell it, but damn if I know any of the others.