What I did for MerMay was-
A one off with a mermaid, and a lowly space-gold miner. Includes some GFD, and size-difference (giantess? Amazon? I feel like there should be a word for this) along with pegging, and light transformation. If you didn't think I was weird before, you'll probably think i am Now.
28 pages, fully colored, includes all thumbnails, a few sketch versions of the pages, cover art, and early concept art from when i was trying to figure out what i wanted the story to be.