i believe i heard of that game. only games i played that had marriage option was Perfect World and LOMA (Legend Of Martial Arts) maybe another game but i never tried it.
perfect world gave marriage outfits to each player a few items they could either keep or pass out to friends who came and as soon as they got married it would send out a server wide message.
loma was pretty much the same since it was the same company as perfect world but perfect allowed player interactions while loma certain player interactions could only be performed after marriage nothing serious lol.