This is my first review and english is not my first language so please be understanding.
Hakoiri is a very average manga and hentai.
When evaluating works like this, I think that the "hentai" factor should be evaluated apart from everything: even though there are few scenes, compared to others that I have already read, they are satisfactory.
There is nothing much, they do not show any specific fetish, in case it's what you are looking for, but they are also not weak (with the exception of the two one shots).
Story: 5. I got the impression that it started in half. Our protagonist couple is made
up of a university student who dates the heir to a renowned family. They fell in love when they were younger and, when he goes to Tokyo to study, she follows him soon after to start dating.
The manga starts at the moment when they are running away from the girl's family (who do not accept the boyfriend because he's the son of subordinates) and looking for a place to have sex for the first time. We don't get any flash backs from the past like when or how they met or the construction of this relationship, which left the story poor because it is clear the intention of the manga to assemble a hentai well integrated with the story.
Charecters: 5. The only character with any kind of growth was the boyfriend (who was clearly seen by history as the protagonist). The girl, in the entire manga, was just there to "love him" and it seemed to me that the plot with her family was the only thing she had to offer as a character. I felt very frustrated about it because we started the story with them running away and ended the story with them running away, the only difference being that the boy had a moment of courage near the end.
Art: 5. There is not much to say about the art, only that the bodies are well
drawn (unlike some others we find out there, but still worse than many Doujins that you can easily find online).
Enjoyment: 6. It was a quick read for me and I don't regret it, but I probably won't reread it in the future.
For the One shots: DON'T READ THEM.
The first is just about a guy who is running away from home. It doesn't even have sex in it.
And the second is about a girl being "raped" by a teacher assisted by her friend. (raped is in quotes because initially she doesn't want it but after being held down by her friend asks the teacher to fuck her).
Overall: 5. You can find better online