Natsu's Demon

After two years of being Mirajane's designated 'special friend', things began to pick up in the world. Their relationship will evolve past being merely carnal to that of a loving couple. But will the dragon become content with just one conquest? Will he be faithful to his demon or will he conquer others? And what about Mira...what if she...really likes that? Lemons! NaMi x Harem