Take part gay teenage lifeguard lover of rom-coms, just broken up with the Love Of His Life(tm), add a non-binary (because they all are) mermaid, sent on a month long Rumspringa to the surface, make it into a love story (of course) with all the (teenage) relationship twists and turns that entails1… and you have Out of the Blue.
That … is not at all the sort of book I normally find myself drawn to (I picked it up for the 2022 Book Bingo), but you know… It’s actually kind of sweet. And now that it’s over, I think I’m glad to have read it.