The game revolves around memories, which shape the entire world. When someone or something is forgotten, the person, place, or thing fades from existence as if it had never been. When the hero, Kanata, learns he has the power to bring back forgotten things, he and his friends are tasked with restoring the lost world and stopping whatever causes things to disappear.
Like I Am Setsuna, the game features an ATB battle system similar to the older Final Fantasy titles.
This game contains examples of:
- Action Bomb: Some monsters attack mainly through blowing themselves up.
- And the Adventure Continues: Regardless of which ending you get, Kanata travels the world to restore everything that was forgotten.
- Astral Finale: The final boss fight takes place on the moon.
- Bittersweet Ending: Both endings are this, though one is decidedly more bitter. In one, Lumina sacrifices herself to save the world, leaving Kanata alone. In the other, Lumina doesn't sacrifice herself, but the moon will eventually collapse and destroy everyone.
- Doomed Hometown: Two for the price of one! The opening cutscene shows a king whose kingdom vanishes, and shortly after, Kanata's entire hometown vanishes.
- Fading Away: Once something is completely forgotten, it vanishes from existence. Kanata can somehow reverse these effects.
- Fake-Out Fade-Out: Borders on being an exaggerated example. The game does fade to white and plays the credits in full, then takes you back to the main menu. The only way to realize the story is not over when you reload your save after the "final" credits roll. You are not given any prompt to do this, making it very easy to miss that there is more to campaign. This is only somewhat mitigated by the fact that the pause menu's story progress stat is only near 70% when you face what appears to be the final boss.
- Fetch Quest: Plenty of these are present during the game's latter half, when you backtrack to the once-explored areas.
- "Groundhog Day" Loop: The subplot of one town. The party discovers it when no progress is made by the next day on a bridge they need to cross.
- Last-Second Ending Choice: Which ending you get is dependent on your choice after you beat the final boss.
- Lunacy: The moon is said to have created the world, and plays an important role in the story as a whole. It's also the setting of the final boss fight and catalyst for the ending.
- Men Are the Expendable Gender: Every soldier in the Imperial army, minus a few high ranking officials who have an active role in the plot, has the same appearance - a generic, young male design. This trope is especially notable when the heroes are against the army. Although one can make the case the heroes are just simply defending themselves, the fact remains that Premier Zemrode only ever holds a grudge against them for daring to go against the empire's plans to combat the "lost" phenomenon, an act he views as treason. The number of soldiers that the party may have gone to blows with is never once referenced, which is especially puzzling once Commander Galdra joins the party. However, a recurring trio of soldiers implies that the heroes do not fatally slay the soldiers at least and may merely deal enough damage to force them to retreat.
- Multiple Endings: Depending on the choice you make after the final boss, the ending changes.
- One-Hit Kill: Some of the late-game enemies possess such attacks, including the Final Boss.
- Samus Is a Girl: Commander Galdra turns out to be a woman.
- The Empire: The main country of the game is called The Imperial Empire and is a straightforward example. The Imperial Army is is their military as well as their police force, with soldiers acting as guards whenever needed. They are not afraid to conquer smaller populations if they believe it is in their best interests.
- Traversible World Map: Played straight. It also features no Random Encounters.
- Your Days Are Numbered: The ending where Lumina lives ends with the knowledge that eventually everyone will be doomed when the moon collapses.