Like the user below me said (and I thought I was the only one who felt that way), the motives behind many of the characters' actions were EXTREMELY vague. There was no build or valid progression or anything, so I was a bit slow on the uptake as far as pacing was concerned (or lack there of).
The characters were just... They were not portrayed in a sympathetic light at all with the exception of glasses guy; he was probably the only character that made any sense. Though what he did in the beginning was thoroughly fucked up, I can at least understand why he did what he did--not "agree"..."understand." That being said, the situation he grew up in was abnormal beyond belief, so there's no wonder he felt justified in doing what he did--given how "love" was expressed to him as a child, I was not at all surprised by it. I was disturbed by it, but not surprised. He was understandably scarred and insecure as an adult because of his ruined childhood. I felt terrible for what he had to go through as a child.
The old creepy guy really, truly pissed me off, and the fact that he was still allowed to interact with the other guys and make light of all the atrocious shit that he did--and still got a fucking spin off like he even fucking deserves one--made me so angry that I could have punched someone. Also, one event in the dead center of the series alluded to the fact that Tatsuyuki could have avoided his encounter with the old ass wipe after all. It was as simple as that, so why didn't he? sigh In reading this manga, I ended up feeling like I'd been trolled hard by the mangaka, tbh.
I know that this series and "Saezuru tori wa Habatakanai" are two completely different manga, so comparing them would be like comparing apples and oranges, but it too deals with gratuitous sexual encounters, childhood traumas, unrequited love and feelings of hopelessness/helplessness. It is also is filled to the brim with shades of gray and splashes of beautiful light in an otherwise dark, gritty atmosphere. However, Saezuru flows much better, is beautifully executed and is actually quite enjoyable. This though? No, absolutely not.
That's just my opinion though. Read if you're curious.