Have some ideas:
Lovely Magnet Miku: https://yande.re/post/show/205657/
Ama no Jaku Gumi: http://danbooru.donmai.us/posts/1037598
Gumi and Rin: http://danbooru.donmai.us/posts/1285445
Kagiyama Hina with guns: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=28176715
