Not too long ago, I ran across some old posts where people were theorizing about relationships between Tails and Sonic. Some of it was the normal slash stuff, but there were also 'Tails is a girl' theories, which made me blink and stare in confusion. I looked into it, and it seems the original one that used this concept was an old Hentai Japanese fan-comic. There was also some possibilities, perhaps, of Tails being female in the original design specs? At any rate, most of these relationship theories seem to be excuses to get Sonic and Tails together as a romantic couple. Or more specifically, just for them to have sex.
Now, my first thought at all of this is to just roll my eyes. Hasn't these people ever seen a little kid idolizing an older brother or neighbor? A tagalong shadow? But, as always happens when I decide something is impossible, I started thinking of possibilities. My brain thought, "What would it be like? Hiding such a huge secret from everyone for such a long time." Ignoring entirely the rest of the universe, a small, interesting tidbit of a story started growing in my head, so of course I had to write it to get it out of there.
I don't pretend that this story fits well into the Sonic universe. I know it contradicts many things that are canon. Consider it a "What if?"
Sugar and Spice, a Sonic the Hedgehog fanfic