Looking for a bl

I remember reading this bl where the love interest had lived next to each other and the semi would hear the uke and his bf through the walls and realized he knew him from school. Then they slowly start running into each other more, I think they also had to do a project tg. then the semi starts plotting on the uke. Once they do start hooking up the uke ex bf acted all crazy one time a broken into his apartment. PLSS lmk if u guys know what im talking abt i can try remember more details