It's not seinen but shounen..
http://www.mangago.me/read-manga/ao_no_flag/
I don’t know but you might enjoy King’s Maker and the sequel series King’s Maker Triple Crown.
http://www.mangago.me/read-manga/king_s_maker/?zYDI
I think they both are put together here tho so it makes it easy.
It’s gay but that’s not completely the main focus of the story and I like that! In the beginning the illegitimate son of the asshole/pedo king plans to overthow him to save one of “the Kings children” that he falls for. The sequel series is when they become adults and it gets a bit more spicy if that’s what you’re looking for too.
Hi! Can anyone rec me a seinen with gay characters? Similar to this http://www.mangago.me/read-manga/fire_candy/
Or seinen with lgbt focused plot is okay too! Most preferably the underrated ones. Thank you! :))