Kentei Gakuin no Magan Kenja

A decade after a devastating cataclysm nearly wiped out all life on Earth, the young magical prodigy Lag Logline is bestowed with the prestigious title of Sage. Entrusted with a monumental duty, he must ensure humanity's survival against a prophesied destruction destined to occur one thousand years in the future. To bridge the vast expanse of time, Lag casts a powerful spell to freeze himself in stasis, waiting for the era when his intervention will be needed most. When he finally awakens from his centuries-long slumber, the world he steps into is entirely unrecognizable. A chance encounter with a skilled swordswoman named Clau reveals a startling truth: magic has been completely forgotten by this future civilization. Adding to his confusion, Lag’s own extraordinary magical abilities are mistakenly identified as an advanced form of swordsmanship by those around him. Determined to understand how such a fundamental force could vanish from human knowledge, Lag enrolls in the elite Imperial Sword Academy. By blending into this unfamiliar society of warriors, he begins to unravel the deep mysteries surrounding the transformed world. Hidden among swordsmen who cannot comprehend his true power, the displaced Sage must navigate this strange new reality to honor his ancient vow and ultimately save mankind from its looming doom.