Well, I read the manga some time ago. I'm not quite sure if it's a yaoi or shounen-ai manga. For what I can remember maybe it's more a shounen-ai..
The story is about two boys. The boy who is the main part, was popular, but then the "new guy" showed up and all the girls are after him now, so the main boy hates him. One time the main boys sees how the new guy is running away from some(or many?) girls and helps him. He then starts doing sexual things to the new guy, something saying about "be quite or the girls will hear" or maybe not, don't remember..
This reationship goes on and in the end they start being a couple I think. So till the end they have more a sexual relationship, but then feelings are mixed up and well, like it's always in mangas ^^
I remeber the manga NOT being a oneshot and not having many chapters either maybe 4-8.
Would be veeeeeeeeeery nice if someone of you could help me find it. Even if it's maybe shounen-ai and not yaoi.

Junketsu Drop

Thank you very much 😀 Finally I can read it again 😀

You're very welcome 🙂