I'm a librarian who loves anime, manga, and reading a wide variety of genres.
This was so good. My only complaint is that Nakamura was a little too focused on Hirose. It bothered me that he only talked to other people when they had some connection to Hirose. It might not have been such a big deal if the tone had stayed humorous throughout, but the ending was a little more serious and prompted me to think more about how all of this was playing out.
I love it when spur-of-the-moment purchases turn out well. I only read a tiny bit about this before buying it. One review in particular was a little concerning, mentioning something about a teacher with a fetish for one of the students. I have no idea what that reviewer was talking about, by the way. Nakamura worries at one point that Hirose has a crush on their male teacher. He might - it's tough to say, since most of the volume is from Nakamura's POV - but the only inappropriate thing the teacher himself did in the entire volume was scoff at the ideas a BL manga might put into a student's head about relationships. Something along the lines of "Two boys dating? Pff!" (Not realizing that the student he was saying this to was secretly gay.).