on the main heroine / girl?

anything on the level of Shishunki na Adam? one of the main girls in that is literally almost impregnated by an incubus monster but she was lucky enough not to conceive during the act. that manga / LN has quite a bit of rape and isn't afraid to push the boundries. kinda looking for more works like it.

Shinogi A-Suke and Oda Non have good tentacle mangas. Just search through their works on nhentai for example.

Pochi-Goya has a good one too.

thanks, but i was asking for serialized works. hentai is easy to come by, but tentacles and monster groping in official manga is rare. something like to love-ru but more daring.

just saw this manga

https://www.mangaupdates.com/series.html?id=72473

there was a full blown slime-futa rape scene on the main girl and every one is just watching like it's not a big deal. you know it's gonna be good when a doujin maker gets to do a manga series.

still looking for suggestions.

Anything by YOSHIKAWA Hideaki
Cambrian
Devilman Lady
Kibou no Shima
Uchi no Musume ni Te o Dasu na! - Oyako Heroine Funtousu - (it has doujins by the same author which are hentai) and Ne.to.ge by the same author aswell
Bishoujo Sentai Petalicon (it's mostly ecchi stuff though, with lolis)
maybe Endless Eden ,i don't remember what it contains though
Phantom Hunter Miko
you will probably like EVILIVE if you haven't read it already
Fobia by U-jin, one of my favorite artists, you should check his other works, though they are more comedy-romance borderline-h stuff
although its not manga, but korean webtoons, i would definitely recommend Lilith's Cord , Narakarana and Siren (Getty)
Matsugaoka Angel
Bloody Mary (in full colour aswell yay)
highly recommended Seishokuki you will like this
anything by SUMINO Yuuji
Gantz (sex with aliens counts? 🤣 )
maybe Yakusai Kochou or Yuusha no Musume to Deba-Bouchou or Zetsurin! i can't say for sure about these last three, but if you have time you can check them out
Goblin Slayer (has potential, for future volumes)
Kunoichi Ranfuu Jou
Tenkuu no Tobira
Ziggurat
Finally, although it is hentai, you should read The Parasite Doctor Suzune

In a time of universal deceit telling the truth is a revolutionary act.
George Orwell

wow what a list, many of them look promising. i'll give them a read and let you know what i thought.

btw, tried looking for Otome x Chigiri since forever. i can't seem to find a host or downloads for it any more. this is one of the few that got a full translation but seems to be lost with time.

edit: i went with your highest recommendation "Seishokuki". my god, this is a hentai through and through lol. how did this get published and is on 9 volumes on-going, amazing. the MC was even deflowered by an alian queen futa. this is hot. looks like my standards have been raised. i dont know if anything will ever come close to the hentai levels of this.

Well in terms of hentai, there is always MAEDA Toshio who established the genre with works like
Urotsuki Douji and La Blue Girl ,although personally i do not like his art, but the anime hentai movies/ovas are good adaptions for their age.
For more recent examples i would recommend Pandra and its sequel by ERECT Sawaru
maybe Brandish and the one i already mentioned The Parasite Doctor Suzune as i love Haruki's art.
On a side note, im trying to find Crack Hound , i had found some chapters of it before some years, and its brutal, it has everything! (zombies-demons-slime monsters and a good art to accompany that)

In a time of universal deceit telling the truth is a revolutionary act.
George Orwell

oh no, i'm not looking for actual hentai. i'm looking for manga that is practically hentai. always like to see how far they are willing to push the boundries.

mind sharing what you have on crack hound? i'll see if i can find any myself.