From http://tea-break.sakura.ne.jp/ (Thanks to the user leungmanchiu for finding the website and commenting about it) Pixiv: https://www.pixiv.net/member.php?id=943
Artist Comment (from the website): It's a rape manga. It's considerably depressing. It should be an erotic comic, but it's not erotic at all. At first, I tried hard not to get a bad aftertaste.
The pic resolution is terrible (474 x 670) but this is the original resolution (it's a doujin from 2007), and there aren't many jpeg artifacts in them, so it's okay, I guess.