Echoes of the Past Core Idea: The protagonist (Yui, the granddaughter of the legendary Yosino) discovers a series of latent “memory crystals” hidden throughout the world. By entering these crystals she can relive, reshape, or extract fragments of ancestral memories. The mechanic works both as a narrative engine (deepening lore) and as a gameplay system (unlocking new abilities, altering story branches, and providing puzzle‑solving tools).
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