This one was so cute! Having Clark and Lois meet when they're younger is one of my favorite premises. It just solidifies the whole "soulmates" thing. Ellen Lane was spot on in this. Great job!
I'm going to guess based on content rather than on style, since it was short enough that I didn't get a solid feel for the style. I'm guessing Nan, who likes to write before-the-series and after-the-series stories.
When I guessed this, James told me I was wrong, wrong, wrong. With so much going on, Nan wouldn't have the time for writing anonymous stories. He's right.