Responses
Boyfriends is a webtoon with a 4 way poly relationship and goth is ftm and the others have some more lgbtq sexualities
http://www.mangago.zone/read-manga/transjitter/
http://www.mangago.zone/read-manga/shimanami_tasogare/ (not sure about this one bc I don't remember much, but it's about social acceptance of the lgbt)
shimanami tasogare for sure. amazing lgbt rep althroughout and the author is non-binary (labeled as x-gender in japan)
Trans rep mangas?? I’ve never read one