Grimgar of Fantasy and Ash (Light Novel), Vol. 12

Still trying to find a way to return to Alterna, Haruhiro and his party fetch up on the shores of the sea. Falling in with a mysterious pirate girl named Momohina, the group ventures forth to the Emerald Archipelago, rumored abode of dragons from ages past. What they aren't expecting, though, is to find a secret pirate haven-at the exact moment that it's being attacked by dragons!