Tristia of the Deep-Blue Sea - S01

An ocean city, Tristia. Tristia once prospered as a key hub of maritime trade, and it was so beautiful it was praised as "marine jewelry". But that was a long time ago. The attack of the dragons stripped the city of its former brightness. The people of Tristia worked hard to rebuild, but everything they tried went wrong, and the city only grew more desolate. At the end of their hope, they asked a Great Artisan to restore the city, Prospero Flanka. Prospero was a legendary inventor who had revived cities that would otherwise have been ruined. The long-awaited day came when the Great Artisan Prosper arrived in the city... However, it was only one girl who stood at the port of the city. Prospero sent his granddaughter, Nanoka, in his place.