Curse ye'll be

A sad dream i had.

A girl and man meet and have feelings for each other. He travels with her on boat, and decides to show her his true form. Thinking she would still love him, he reveals he's a sea demon. Instead she's schocked and panicks, and orders the crew to attack him. In anger and despair, he wrecks the ship, and goes into the ocean to continue living in solitude.