Well I say that, but it is still a side plot in the end - the main story isn't solely about them, so it may not be what you're looking for.

A lot of real estate in the story is given to a BL plotline between two side characters. Even got negative reviews bc of it lol ppl complaining that it felt too BL-ish

Some Desperate Glory by Emily Tesh kinda hits those notes if you're up for some reading