If you're looking for manga similar to "At This Rate, I'm Gonna Come..." The Warden's Relentless Pat-Down, you might like these titles.
Rinko is a run-of-the-mill office lady who deals with her everyday stress by pickpocketing and shoplifting. One day, a failed attempt to take advantage of a peculiarly aggressive molester on a train results in her sudden arrest, after which she's promptly imprisoned to "atone" for her misdeeds. With a clean, spacious cell to herself and a handsome guard watching over her, Rinko's new prison environment doesn't seem all that bad that is, until her "atonement" begins...
Akari and her boyfriend Hiroshi take part in a part-time university experiment: "Happy couples of five years or more become jailors and prisoners. Just how will it change them mentally?". While all five couples started out well, they get swallowed up by the strange prison-like atmosphere. Under the pretext of punishment, the male jailors start sexually assaulting the female prisoners! What will become of Akari and Hiroshi!?
"The most mild-mannered guys are the most dangerous... like me." A gentle man makes an abrupt change and turns into a ravaging beast, and he's all over my breasts!