Wadanohara and the Great Blue Sea

Wadanohara and the Great Blue Sea is a pseudo-RPG with a heavy story focus,
made by Deep-Sea Prisoner in RPG Maker 2000.

A clear blue sea under a beautiful blue sky.
After a long departure, the sea witch Wadanohara travels back home with her familiars.
But her ex-familiar, the shark Samekichi, appears to block her way:
"You shouldn't be here... Leave this sea, right now."