An adult doujinshi circle which was originally created by Mutou Rei, and is currently managed by Yamata Kagami. This circle's works are created by several artist. Currently the circle uses pixiv as as a teaser site.
Circle name: GRAND†CROSS
Members: 八叉かがみ (Yamata Kagami, the leader), COCO, etc.
https://www.pixiv.net/users/1818411
https://www.pixiv.net/stacc/grand_cross
https://twitter.com/grandcross_twit
https://twitter.com/intent/user?user_id=128503693
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG11909.html
https://www.dmm.co.jp/dc/doujin/-/list/=/article=maker/id=25487
http://p.twipple.jp/user/grandcross_twit
http://twitpic.com/photos/grandcross_twit
http://yfrog.com/user/grandcross_twit/photos