Do you know this BL?

So I remember this manga set at school in which the bottom was bullied by a guy (into sex as well if I remember right?) but he met some other guy and wanted to be with him while that bully tried to interfere. Than, to get the bully off, a friend of our bottom started to keep the guy in check and they ended up spending a lot of time together because of him constantly keeping an eye on him, which finally resulted in sex too and the bully stopped being interested in our bottom because he himself became one. Do you have any lead?