Pokemon - Someday, On the Star-Falling Sea (Doujinshi)

Miu, the coddled princess of an underwater kingdom, yearning for freedom.
Cel, a simple, free-spirited denizen of the sea, yearning for knowledge.

One day, they meet thanks to an unexpected (?) twist of fate, and a bond forges itself between them, in the form of a mysterious pendant... and maybe something more?