That's true but this author goes with a specific pattern or theme in every "Game" series of theirs. For example in Oujisama Game, the stories revolve around the romances of each Prince; Ousama Game by a King and King candidates, princes; Kaizoku Game by Pirates. Be thankful this series only features 2 brothers.
buuuut looking at the raws, i might have to revoke my last statement in my previous post.
That's alright. Besides properly speaking the brothers aren't getting together with butlers but personal valets or servants who butle as well for the lack of a proper butler.
Sometimes you can have just too much of something. In this case butler themed stories. One butler and master getting together, sure lots of fun. But it not only does it beggar belief if there's going to be several cases of master x butler within one family or group, but all the stories become sort of blurred into one big too much after the first. I thought Shion's story would have been better if it HADN'T been a butler but some other guy, maybe just an ordinary clerk he met. At least then the romance wouldn't have gotten lost for me in a crowd of butlers.