SiNiSistar

Rabiane is a nun with increased physical strength and sees it as her job to fight the monsters in the city. There's just one problem: she's completely incompetent aka she gets beaten up and then raped by pretty much every mosnter.

The genres would be rape, monsters, tentacle and fantasy.

The animations are good. Not overwhelming, but just what you would expect from Majin.
The story idea is also good, even if the story doesn't come across so well in hentai and due to Rabiane's extreme incompetence, the story elements that come across are somehow broken. If you can do almost nothing, maybe you shouldn't do this job.
The ... "plot" is what you would expect based on the genres. So hentai is definitely not to everyone's taste. Those who are still interested will be disappointed by the uncreativity of the scenes. But you can look at it.
The voice acting is good. Even if you could hope for emotions in your voice or better voice acting when speaking, but it’s still more than enough.
The combination of the genre, the not that great story and the only okay "plot" result in very negative feedback for the hentai.

Whould I recomend it? If you like the genres then this Hentai might be the one you’re looking for. But I wouldn’t recomend it to anyone else.