
They are all assholes ( Haesol I pray for you to find true happiness) but I mean they were written in a way that planned to make them act like assholes... so it is quite well written actually. At least the financial problems and themes of abuses are treated in a realistic way (execpt sex parts lol ). So that the bdsm scenes dont feel way off reality like mainstream fanservice webtoon with no other subject (eg. abuse, mental abuse etc ).

She lead such a tragic life ... but why making all the sex scenes so... arousing (it is also really disgusting at the same time) ? I mean I dont know if the autor chose to denounce the misery she faced as a social outcast but it is just portraying her as a whore that just loved sex. It is absolutly not realistic... i know its a hentai but dont try to be deep if it is just a way to sell some porn while describing this horrid reality some prostitutes face every day. ... or maybe some people enjoy seeing the downfall of poor young innocent girl, I read a lot of hentai that had this typical scenario structure.

Well considering the darkness of this whole plot I think author maybe drawn those scene like that for a reason, I get the weirdnesse you feel but there is a huge and noticeable contrast between those scene and the difficulties she is experiencing.
Maybe#1 the author want us to see things from her perspective "sex feels good" "i feel loved while doing sex" so that's why she enjoy it's that much and don't see things as rapey or disturbing and it has to show during the scene so that's why it feels arousing.
Maybe#2 author is making a critic about the way sex is portrayed trought hentai and such , how it became so vital and necessary ,even like an obsession to some people.
Maybe #1 seems more logical tho

If the author did draw her point of view and distorted the reality of the situation (rape everywhere) to emphasize her disconnection with reality... then it is a really smart way to make things even more uncomfortable.
We could also consider that the sex scene are influenced by the drugs she take.
But I really like your #1 so I think I will stick to it ╮( ̄▽ ̄)╭I still think that porn is not the best genre to denounce rape since hentai is supposed to give fast and easy "pleasure" (no thinking) but it would be unfair to criticize the author for trying to bring some new topics( forced abortion, drugs, abuse etc ) into the hentai world and raise awareness through the readers.
It is a good way to make readers remember that rape portrayed in fiction is absolutely not "the same" rape in real life and that no one should ever cross the line between them
Is it what they call a "daddy complex" ? ( ̄∇ ̄")... loved these two old men from the bottom of my heart ahah