You know how sometimes you read something, and it's just kind of meh? Like you don't hate it, but you don't particularly like it either. That's how this manga is. I think student/sensei yaoi are a make it or break it deal, and 24 Jikan Kiss Dekinai breaks it.
I know the mangaka tried to instill conflict and emotion into this work, but I just wasn't buying it, or more like the characters were flat so it was hard to empathize with them.
This manga also includes another work, about a city boy who moves to the countryside where he encounters a 20 year old who
keeps getting held back in high school and sleeps with anybody who asks. Again, I just wasn't buying into the emotion, and I am not sure if this manga is worth the read.