I read a manga about a straight uke who is drinking, complaining about not getting laid, and he ends up getting taken home by the seme. He freaks out and leaves, doing his best to avoid the seme, only to be invited to a party that the seme host. The uke gets drunk again and the seme ends up shaving his pubic hair off and they have sex. I also remember there were two other friends in background that you found out were fucking each other, and encourage the uke to enjoy what the seme is doing to him. In the one of the later chapters, they end up having a foursome.

Any help would be appreciated!

lol I'm so silly, I literally found it 5 mins after posting this 🤣

It's Yarisugi Party Night