I fully admit I read this to keep up with my Goodreads goal for the year. It's also been on my to-read list ever since I finished Circe and Song of Achilles, so it wasn't entirely picked for ulterior reasons. I'm actually glad I gave this a chance, it was very short but also very engaging.
It takes the name from a Nereid from mythology, but as far as I can tell, the rest of the story has nothing to do with the actual (fairly sparse) story. It's actually more like a perspective-flipped Pygmalion, which is acknowledged by the author in the afterword and in other reviews here.
It was actually kind of a super creepy story that I expected to go a different way. I kept reading (for the half hour or so I spent with it) to find out where things were headed, and didn't even mind that it's a bit lacking in depth.
So, not only did it keep me and my arbitrary Goodreads goal afloat another week, I actually really enjoyed it. Definitely read either Circe or Song of Achilles first if you haven't yet, but this is a nice little bite-sized story after you're done with those.