Escalayer over 10 years ago I have identified the artist circle behind this piece as AC/BC.Here is the link to one of their DLsite products for verification:http://eng.dlsite.com/work/=/product_id/RE030783.html
Escalayer over 10 years ago the circle's homepage/blog appears to identify HIDE as the manager, but my Japanese is elementary at best and there are various other details I'm not too sure about.