Uke's hs crush got married and he was devastated. He winds up drunk, passed out in front of a bar/restaurant. HS boy helps him upstairs where he hears his sob story and slowly starts to understand him. His crush is an asshole who knew his feelings yet takes his new bride to his interior decorating place to use him. High school seme consoles him. While I am not usually into big age gap stories, this one really won me over
Toshishita Kareshi ni Hirowaremashita