That Was My Idea » by Harleenakyle
Arthur and Merlin are two princes whose guardians have decided that they must get to know each other if they are to ally kingdoms in the future. This story is also on AO3 under the username: Lunarcane
T, English, Romance & Fantasy, chapters: 4, words: 11k+, favs: 2, follows: 9, updated: 3/28/2016 published: 2/23/2016, Merlin, Arthur