Anyone can help me?

hey, so i had been searching for a yaoi doujinshi that i read a long time ago, i don't remember what couple tho :(. In the manga, they didn't really have sex(i think) but one of them was infected by something (can't remember) and when the seme eats something the uke feel some sensation on his body so he warned the seme not to eat anything while he is trying to figure out the situation. However, that night the seme still eat some hamburger and the uke call him to stop(?).... This is getting a bit too long but pls anyone know this manga?? ;____;