Responses
http://www.mangago.zone/read-manga/kazoku_ni_narouyo/
http://www.mangago.zone/read-manga/harukaze_no_tranger/ sequel to umibe no etranger
Ummm do they need a good relationship? Cause if not
http://www.mangago.zone/read-manga/cosmic_boy/
Good relationship with family & uncle:
http://www.mangago.zone/read-manga/the_best_smell/
Good relationship with brother:
http://www.mangago.zone/read-manga/for_your_love/
Looking for Yaoi or shounen ai where the main characters have more interactions with their families. Like maybe the mom knows about one of the MC being gay or maybe the family just has a strong relationship.
Preferably college or late high school setting