Tau often posts almost-finished pages of upcoming comics on his Pixiv (https://www.pixiv.net/member.php?id=27086057) and then deletes them once the comic gets close to completion. I saved the ones for this comic before they were deleted. These in-progress pages are often different from the ones he puts in the sample, so by combining them all together you get a pretty significant portion of the full doujinshi. To be honest I'm not 100% sure what order these are supposed to be in, so I ordered them in the way the sample seems to indicate (which may be wrong).

The dialogue implies there's a missing orgasm between pages 4 and 5.

DLSite: http://www.dlsite.com/maniax/work/=/product_id/RJ233469.html
DMM: https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_135384/
DiGiket: http://www.digiket.com/work/show/_data/ID=ITM0175982/