It's been over fourteen years between the uploader comment and mine, and I can't say my opinion is that much different. Shame too, since (imo) Tokisaka Mugi got the drop on a lot of 2010s artists with these ridiculously thick futa babes.
From a historical standpoint, I love these doujinshi. From an erotic standpoint, fuck, these doujinshi are incredibly blue-balling.