1-2. straight x gay - best friends. one is gay, but lover doesn’t know it. lover then comes out to the friend, whom is in love with him, lover asks his friend to introduce him to his gay friends.
3-5. straight x gay bartender - lover got his heart broken in middle school when he confessed to a guy. the guy got disgusted and started spreading bad rumours about him. move forward a few years, lover works as a host. he is a frequent customer of a gay bar. a customer at his work place (divorced twice) begins to make moves on him after noticing the gazes from lover despite him being straight. lover and customer are both heavyweights. lover has a thing for not dating straights due to his trauma. I think the guy he confessed to is the customer
Omae ga Baka o Iidasu Hi ni wa