Kanojo wa Dare to demo Sex Suru.

Both are about netorare in a school with students, even the protagonists are alike since they both end up "helping" their girlfriends have sex with other guys (girls in the case of Mesu Nochi Torare), both of them have a similar feeling and belong in the same category of netorare, so yes, if it's your thing, go at it. 

As the names indicates, there's netorare in Unsweet: Netorare Ochita Onna-tachi, as well as in Kanojo Wa Dare To Demo Sex Suru, both happen in a school mostly and the producer is the same (T-Rex), so the animation, character design and art style is very similar is various aspects, Kanojo Wa has the boyfriend more willing to the whole thing, so maybe it's netori or something, but both are netorare at the end. 

Both involve the protagonist watching his love interest have sex with lots of random guys, mostly old men, Otome Dori is a lot more brutal though, while Kanojo Wa Dare actually manages a sort of bittersweet ending (much more bitter), but overall both are netorare hentai with teenagers and there's a school sometimes. 

In Oni Chichi: Re-Birth they decided to go for a netorare route, not sure why, but that's what Kanojo Wa Dare To Demo Sex Suru is all about, netorare in mostly a school with the students and the teachers involved (or other people too), so yeah they are very similar, except that since Oni Chichi is a series of OVAs it doesn't end just there, but that's why the recommendation is just for Re:birth. 

Hentai about cheating, there's lots of it and here's two examples, in Kanojo Wa Dare To Demo Sex Suru the girl is completely slutty from the beginning, while Ore Wa Kanojo Wo Shinjiteru is the process of her becoming a wife submitted to another man that isn't her husband (and the husband never gets to know it in the episode, maybe in the visual novel though), but there's lots of cheating and everything that that implies in both, go at it if it's your thing.