Someone find me this manga please..

Can someone tell me the name of the manga that about "a dragon i dunno ..i think about this guy granny who already dead and have this ancient story about marrying a dragon if they let the dragon make rain for the village they promise to make their daughter as it bride(it is yaoi actually) and suddenly he met a guy at the post and this guy is looking for his bride..this guy is the dragon.. unfortunately he is the person that the dragon are looking for(the bride)" i read this before then i forgot to mark it..after reading whole bunch of manga then i realised i started to like that manga and looking for it back