There was this manga where a guy belonging to a traditional yukata selling house was forced to get married to a beautiful guy , who was called his "wife", but it turned out that he was the seme all along. The uke's grandpa was the one who supported it all along.
Actually i was looking for this as well!! The one that I'm looking for is the same as this one....almost except the seme-male-bride is a high school boy and the uke is a much older guy who runs a family businesss. They live in an old fashioned house.
There was this manga where a guy belonging to a traditional yukata selling house was forced to get married to a beautiful guy , who was called his "wife", but it turned out that he was the seme all along. The uke's grandpa was the one who supported it all along.