I thought to make clear right in the title what it's about xD

So I am aware that there's like 500 manga out there with the description I will give (cause I searched for it and found like 500 carbon copies). So I hope that the plot description triggers someone's memory of thd title or artist cause I really can't find or remember it.
(Search did nothing, but maybe because I'm on mobile? I got weird results for what I put into the engine...)

It is a One Chapter story (sadly).

Visual Description
Three guys. Uke smaller than the other two. Uke and friendly seme have light hair, the serious seme had dark hair. All are students (high school I think?)

Plot:
Uke is exchange student at country school. Hates everything, pushes all people away. Flashbacks of being scared of being found out to be gay.
Semes try to befriend him, but uke is dismissive. Uke doesn't want school uniform cause he doesn't want to stay anyway.
Uke ends up ripping some important piece of paper.
Semes drag him to house of light haired dude (I think) and do the stuff.
Uke decides to stay (lol) while light haired seme is hugging him, acting like he's sleeping.

It would make me very happy, if anyone knows which story I'm talking about!

https://www.mangaupdates.com/series.html?id=132620

I believe you are looking for chapter 9 in Seikaku Warui Uke ga Guzuguzuni Nakasareru Hon. Bokura no Nichijou no Mouhitotsu no Saundotorakku by Kanai Kei

Yes, that's it!
Thank you! 😃