Illusion of Years

What if Mai wasn't completely human... or human at all? What if she wasn't even supposed to live on earth? Escaping the fate that she detested, she was allowed 18 years as a human. Now that 16 years have passed, her nerves started to get to her. And to top things off, a man keeps showing up during the middle of investigations, begging her to return. How will Naru and the team when her only secret threatens to tear them apart.