The island of Tristia was once an important port city for maritime trade. A veritable jewel of the ocean where merchants, sailors and travelers flocked to for its booming commerce. That was before the dragons attacked and destroyed the city. Although the citizens have worked hard to rebuild, setbacks occurred which plunged Tristia deeper into despair.

In an emergency plea for help, the people of Tristia send an urgent communiqué to the legendary inventor Prospero Flanka for his aid in reviving the fortunes of the city. The Tristians wait for Prospero anxiously but when the fateful day arrives, it is not he who appears but his 14 year-old grand daughter Nanoka, a highly skilled inventor in her own right.

Spur the redevelopment of Tristia and reverse the decline of once powerful city. In concert with a golem named Tenzan that she created, Nanoka retrieves parts and ingredients to create new items for sale that may empower the commerce and financial resiliency of Tristia.

Streets in the city of Tristia grow and change depending on how Nanoka researches, invents, and produces items during the course of the game. Once an item is marketable, Nanoka may sell it to a shop which will then widen the streets of Tristia as income rolls in and improvements are made. Nanoka is not the only inventor in town and rivals such as Panavia Tornado, and Faury Carat (yes, they're named after fighter jets) also compete for acclaim and rewards.

Aoi Sora no Neosphere: Nanoca Flanka Hatsumei Koubouki 2: A sequel of Tristia of the Deep-Blue Sea from Kogado Studio (Kumasan Team). Set in the Neosphere kingdom that fly in the air by ancient E technology. Neosphere kept going to ruin after world union war. And then, Nanoca was called to rebuild the kingdom.