I believe the manga is an accumulative of short stories the specific one I'm looking for is set in a bar the uke goes to I believe it's his sister's bar. He goes often to look at the seme because he likes him but the seme doesn't notice him because he's plain and isn't "attractive" so in order to get the semes attention he gets a makeover, he goes back to the bar with his new look and the seme talks to him and they end up sleeping together. The seme sees the uke walking with his brother-in-law and gets jealous and then after he sees the uke hugging his sister and gets the wrong idea and is jealous . . . I've been trying to find this manga for a good minute if anyone can help me I would be so overly thankful!

It sounds like "Moment" (Chapter 3) by Naono Boura.

Yes thank you!