Nananana

I am wondering if someone know this manga, a yaoi actually. What I remember is that they were neighbors, then the seme really likes uke. But what he did was like bully him? He once put a paper bag in the head of the uke so that other people would not look at him, that was inside of the classroom. And then even before they went out, they did it already like many times lol. Oh yeah, The seme saw the uke kissing a girl and got really jealous. Hahaha. I think the seme even punched the uke in the face and his nose bled. But yeah, they got together in the end. But I think in the last chapter, a guy was talking with the uke and the seme saw it from afar and got jealous, really really. Saying if he could lock him up so that no one would look at him. That's all I can remember. Please help! Hahaha Thanks a bunch.