'I've been waiting to do this to you all month. Gods, you've been driving me crazy.' Merlin whispered in his ear. Arthur continued to writhe and moan under him. 'I had no idea. I love you Merlin.' Said Arthur panting harshly in the hollow of Merlin's neck. Top!Merlin Bottom!Arthur. Kinky butt sex scene. Its practically porn at the end. Happy ending, fluffy. tiny bit of angst.