Dare ga Yuusha wo Koroshita ka

A prophet once foretold that a hero destined to vanquish the Demon King would rise from a humble village. The villagers placed their unwavering faith in this prophecy, for among them lived a young boy who displayed extraordinary talent in both swordsmanship and magic. Eight years later, that very boy fulfilled his destiny, growing into a true hero and successfully slaying the Demon King. Yet, his ultimate triumph came at an irreversible cost. Alongside his victory, he became someone who would never return home, leaving behind a legacy shadowed by tragedy and unanswered questions. The central mystery surrounding his fate lingers heavily: why did the hero die immediately after saving the world? Four years have passed since his death, and as scholars begin compiling his remarkable achievements into historical literature, the obscured circumstances of his final moments are finally brought to light. What begins as a simple documentation of a legendary figure gradually unravels into a deeper investigation, threatening to expose the hidden truth behind the hero's untimely demise.