I know that a lot of people hated this kind of theme and although I've read a lot of worse manga on the internet, this is the only one that made me stop reading to just take a breather and think 'what the fuck is happening'. The writing is brilliant, and the characters are all well-written, especially Airi and Imai. You can see how they portray the emotions of Airi as she goes through emotional turmoil that is stacking on her head as the story goes on.
I can agree that this type of story is not for everyone, that's for sure as the themes are heavy on sexual violence, rape, and manipulation. Other people might think that I'm sick for reading this but yk what, I know what the boundaries of fiction are and not, so if you know how to differentiate those things then this is a good thing to read.
Although I've said those things in the 2nd paragraph, honestly I don't recommend this for people who suffer from the themes I just mentioned above (and what the other commenter said), it is very triggering, and honestly, it's just a very depressing story to read and I don't like the feeling I was left after reading every chapter, it's very heavy thinking that it happens to other people in real life too.
I am also wondering where did the mangaka got the idea of writing this kind of story.
Lastly, the problem with this rn is that I haven't seen any progress in the manga, it's either the mangaka stopped publishing this or I just don't see any uploads on the internet. I still hope that there will be new chapters as the last chapter I read (chp.36) is making me happy, and I hope that Airi will get the happy ending she very well deserved.... BUTTT, I doubt that she'll get it, HAHAHAHUHUHUHU. T_T, pleaseee mangaka-san! Let Airi be wellllll.