It's not that one (however, I read this one before as well and quite liked it, so thank yoiu for reminding me), but thank you for the try, it was a good one! The manga I'm thinking of was a oneshot I believe.
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I hope you find the right one ヾ(☆▽☆)
Thank you so much, I hope so as well. I just remember the general story and the fact that I liked it and wished it was not a oneshot but a full manga.
Does anyone know this manga? A guy who is originally from the country, comes to some big town just before he is supposed to get married, to find out if he is really gay or not/try being with a guy. He still plans on getting married regardless, this is his last moment of "freedom" to him, so he wants to be honest with himself, no matter how unfair that is to the woman he is marrying. He picks up or is picked up by a guy who gets pissed at him for being insincere to both himself and his fiancé by doing this and treats him harshly at first, but they still end up sleeping together. The next morning when the guy from the bar wakes up, MC goes back to his village. The bar guy thinks he probably got married to the woman he was engaged to, and thinks of him once in a while, until one day, after some months, the country guy comes back to tell him he didn't get married and just went back to sort things out. I think it's a oneshot, but not a stand-alone one, it is in another manga book either of other oneshots, or there is a main story and this oneshot just comes with it. PLEASE HELP ME