2D Dream Digital Anthology #038, actually the 1st half of physical form 2D Dream Comics #248, the second half being #042.
Despite the publisher claims to have all the color comics from 2D Dream Magazine/二次元ドリームマガジン and its supplementary (闘神艶戯/Toushin Engi, etc), there are actually quite a lot that is not included in this anthology, possibly they are held back for future release. Due to the lack of scans of the magazine those works might be hard to get access to.
this one bought and ripped by myself from: http://www.dlsite.com/books/work/=/product_id/BJ010718.html/
info on mugi (physical ver.) http://doujinshi.mugimugi.org/book/458332/
worthwhile to get the physical version: http://www.amazon.co.jp/gp/product/4799201301/
If only Parfait could do some more fullcolor work like this one... Would like to see a full story version of the one here, but that's probably impossible...