While attempting to return to Alterna, Haruhiro and the party push through mountainous enemy territory towards the sea.

Following one adventure after another, they reach the seashore at last, and they find a single ship landed there.

When they go to investigate, a girl with a fake mustache, of all things, appears!

"I am Momohina! Name yourselves!"

Led on by their meeting with the mysterious pirate (?) Momohina, the party heads for the Emerald Archipelago, where dragons have long been said to reside. What the group finds when they arrive is a pirate's haven, thrown into chaos by a dragon attack?!

The tale of adventure born from the ashes moves its stage to the sea, and a new tale is woven.