Lost Sphear

Lost Sphear takes place on an unnamed world where its Moon is treated as its creator. The opening scene shows Oboro, a king of the ancient Plated People, watching his soldiers and world vanishing into nothing. An unspecified time later, the young Kanata, together with his friends Lumina and Locke, explore the land outside their village Elgarthe, encountering a rise in monsters. Returning to Elgarthe, they find it transformed into a white void called "Lost". Using the memories of prayers from the villagers to a local alter, Kanata unlocks a power to restore the town, and upon learning that other parts of the world are also becoming Lost, he resolves to save the Lost using his powers. He is initially employed by the powerful Gigante Empire, but upon learning their lack of ethical methods and the fact that their actions are worsening the problem, he defects and sets out on his own.
During his journey, Kanata's group is joined by Van, crown prince of a kingdom that became Lost; Oboro, whom Kanata rescues from being Lost; Shera, lead warrior of a tribe who oppose the Empire's exploitation of their land; Dianto, a sentient monster born from a village's prayers; and Galdra, female Commander of the Imperial forces who defects with Kanata's encouragement. During an early mission for the Empire, Locke is severely injured, and is secretly turned into a mechanical soldier who initially fights the party before regaining his memories and rejoining them. Van briefly betrays the group after Kanata fails to restore his kingdom, but is in turn betrayed by his former ally Krom, a man with strange powers who has been influencing the Empire's actions. It is revealed that the Moon is a techno-magical system which is striving to create a world free of conflict, repeatedly destroying and recreating it. During an earlier cycle, Krom helped steal the Moon's power and merged with it in an attempt to recreate a world free of its influence. The current crisis is Krom beginning his attempt.
After initially defeating Krom, the group are forced into a version of Elgarthe in the realm of Lost. There they learn that Kanata and Lumina were born directly from the Moon, able to harness its powers. Returning to the world, the group rally their allies and discover a way to reach the Moon and defeat Krom, who has permanently merged with the Moon. With Krom's defeat, the Moon begins to disintegrate, and after the others flee, Kanata and Lumina unsuccessfully attempt to restore it. Lumina decides to sacrifice herself by returning to the Moon. Kanata can choose to either allow this, or use his powers to rescue her. If Lumina sacrifices herself, the Moon is restored and Kanata finishes restoring the world to create a future ruled by humans. If Kanata saves Lumina, the Moon's destruction is halted, but the Lost remain a threat and Kanata resolves to continue restoring the world despite hopeless odds. The game ends with a shot of the cast, including Lumina depending on the final choice, gazing up at the completed Moon shining on an intact landscape.