Responses
I think it's this one??
https://www.mangago.zone/read-manga/bokura_no_issen/
Holy moly YES THIS IS THE ONE THANK YOU (≧∀≦)
https://www.mangago.zone/read-manga/sweep/
this fits as well just wanted to recommend cause it’s so cuteeeeeee if you haven’t read it yet (▰˘◡˘▰)
All I can remember is that:
• Salesman (blonde or light-colored hair)
• Highschool(not sure) student (black hair)
Salesman is drunk > student helps salesman > salesman suddenly confesses to student > student adores him after that
Then after few events,
These two are caught by black hair boy's girl classmate (who likes him). She condemns their budding relationship because they're both boys and has a huge age gap. So, the salesman feel guilty even more after what she said (who was the only morally sense in the story). However, the father of the black hair boy supports the relationship and black hair boy defends his choice to be with salesman. The girl ended up resigning the argument and tolerated their relationship.
That's all I could remember ┗( T﹏T )┛