Yuusha ni Narenakatta Ossan Kyuuhei, Jinrui no Shugosha to Naru

Twenty years have passed since the Demon King's defeat. Though Raina was once summoned as a Hero, he lacked the talent for the sword and could only watch as his companions set off on their journey without him. Now a middle-aged man, he makes his living in the royal capital as a lone archer, tirelessly picking off the monsters that appear. His quiet life, still shadowed by the regrets of the past, is upended when a young girl named Ariana appears before him. She carries a momentous title—the new Hero—and with her arrival comes grave news: the Demon King is poised to return. Confronted with the failure that has haunted him for two decades and the imminent revival of his world's greatest evil, the middle-aged archer takes up his bow once more—this time rising as a true Hero and the guardian of humanity!