Responses
For those interested the manga was called Kore Wa Koi Ni Fukumare Masu Ka and the sequel is Kore ga Koi na Wake ga Nai and the sequel focuses on the guy who had the crush on one of the character's from the 1st book and I was right he did tried to molest/rape him in the first book. But I was wrong about where the main couple from the first book got it on in though... It was an equipment room not a bathroom
Ok, so this was around maybe 2016 I stumbled across the yaoi, which I absolutely don't remember the name of, I just remembered it having shounen-ai/yoai tags. I remember skimming throught it briefly in case I came back to it. And from what I remember it was a sequel, set in a high school and it pretty much had an MC who had a crush on the Uke/bottom in the previous book, and I think he tried to isolate him in a room and tried to "molest" him but the uke's man made it in time, and I think a few pages later the MC hears the the couple from the other book get it on in a bathroom stall next to him. And I remembered it recently cause I remembered an anon commenting in the comment section "This is better than that rape filled Caste Heaven" I know the info is a little vague but I know it was around 2016 cause Caste Heaven barely had 10 chapters out at that time, if anyone finds out which manga it is please let me know, thank you!!!!