I have read a lot of yaoi / shounen ai manga. Of course I haven't read all of them, but for as much as I have read, this manga tackles something others don't. The reality of being gay/ in a gay relationship. From the research I've done, I know Japan is not as progressive to the LGBT community as the USA or Canada is. Gay marriage is still not legal. This manga shows the logistics of this and even discusses the legal aspects in Japan. This taught me a lot of things I did not know about the country. This manga's first volume was mostly justabout the yaoi, but the second two volumes tackles so many issues LGBT individuals may face in their life, and many specifics people living in Japan suffer with. Without spoiling anything, both men in this manga are very dynamic characters from different backgrounds and families and social groups. They both struggle with not only coming out to friends, family, and strangers, and to themselves. This manga is so much deeper than your run-of-the-mill yaoi fluff. (though of course there is everything yaoi fans still enjoy in it *winkwink*)
I'm writing this as a female part of the LGBT community herself, so I can speak to some things, but not all (I'm not male nor do I live in Japan.)

I highly recommend reading this if you are a fan of the genre and would like a more realistic yaoi which conveys the life of men in a relationship in Japan.