Seems something to do with Yamasaki Masato http://www.pixiv.net/member.php?id=183467
http://blog.dmm.co.jp/kouhou/canopricomic/article/96018.html 複数の絵師の方々に同じ世界観の同じ時間軸で A bunch of artist using the same world and same time 作品を制作していただくアンソロ企画です。
I suppose it's the Papa na iu koto collaboration work.
And a list of all the work related to it http://www.dmm.co.jp/en/digital/book/-/list/=/article=series/id=12370/media=comic/ Currently 16 Serialized in Canopri. Kanesada keishi, Aoi Hitori, Ooshima Ryou, Zunta, Aida Mai, Yamasaki Masato, kazumiya akira have drawn it.