勇者一行として魔王を倒し、その後も長く生きるエルフの魔法使い・フリーレン。女神の石碑に触れた途端、彼女の意識は過去へと遡る――物語は、過去を慈しみ、未来に希望を託します。英雄たちの“未知”を旅する前日譚ファンタジー、第12巻！

Upon touching the ancient monument of the Goddess, Frieren finds herself cast back in time to 53 years before the death of Himmel the Hero. Her old adventuring comrades don’t know she has come from the future, and Frieren realizes she must protect the secrecy of advancements in magic from their enemies. Here, the Demon King has not yet been defeated, and his minions are still powerful and determined to destroy Frieren!