This manga has to go to horny jail!

Okay,unfunny jokes aside,this is a pretty bold story,it's always interesting to see a manga display matters of sexuallity in such an explicit manner,I personally see that as one of the many strengths of Inio Asano(Oyasumi Pun Pun,Sekai no Owari to Yoaki Mae) as an author,he displays it as a normal thing and doesn't fear showing it,and that gives a kind of sincerity to his work,but yeah...sometimes,at least for me,if you go too far on that,not only does it just become borderline hentai,but also laughable.
And well this is a comedy,so it makes sense that it's laughble,but that's the joke,they have sex,they're horny,and that's what carries the "comedy" aspect of the series,and it's also one of the only things that is slightly entertaining here. The story is painfully cliche,and it doesn't even try to not be,setting up all the stuff you've already seen in thousands of other potentially better written and funnier romantic commedies.
The art is pretty good,I personally like Mengo Yokoyari's character designs
specifically,and overall it's pretty solid,so no noteworthy problems there.
I also kind of liked Saito and Subaru,together,that is, their interactions are sometimes fun to read, (usually when they're not being repeteadly horny because why not),but there's not much depth to them individually either,Saito is an average dude whose character trait is being in love with the main girl,and Subaru is a donzel in distress,her quirk being that she is a sexually repressed tsundere,and that's pretty much it, and as I said, they're made slightly better by each other,wich is a good aspect,means they have a chemestry that the reader can identify.
So the commedy and the interactions between the two protagonists are what drive the series,and even that is not always great,you'll probably laugh at one joke or another,and smirk at some cute moments, but that's all the enjoyment the manga has to offer,it's a good thing that it's short,because I would probably not be that interested in going through to the end if it was longer.
Kimi wa Midara na Boku no Joou is a mediocre romance story that has good chemestry between the main characters,decent comedy and a story that will probably force those that demand even a small hince of originality to drop it even though it's so short; if you don't mind all the cliches and poor writing and think the characters and slightly funny jokes can carry you through this story,than go for it,if not,I advise against reading it.