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This is Megumi's Milk, an obscure series by Yukihiro Inoue published in Champion Red Ichigo that was never compiled into a tankobon (not even a doujinshi from the author like the second volume of Bakekano).
Like Bakekano, it's notable for its graphic full frontal nudity, even if the art is pretty simple.
I've been holding onto the scans for a while as I slowly worked through translating them, but I'll post it now.