A powerful prophet named Eisen Otisu once trained one hundred heroes to defeat an evil god and save the world. In the final battle, Eisen sustained severe injuries while shielding his disciples, forcing him to retreat to another realm to recover. During his absence, the heroes used their extraordinary abilities to rebuild and develop the world, each rising to prominence across the continent. Though Eisen had hoped to retire quietly, his disciples never forgot their beloved master and frequently sent him letters detailing their accomplishments. Moved by their devotion, Eisen decided to journey across the land as an adventurer, accompanied by his most faithful pupils, Rinne Rutostand and Fiera, with the goal of personally visiting each of his former students and sightseeing along the way. However, despite his intentions to travel incognito, he inevitably becomes entangled in local troubles wherever he goes. His vast prophetic power, accumulated experience, and gentle but overwhelming competence compel people and even non-human beings to seek his help, revealing that a mentor of his caliber cannot easily escape being relied upon. The ongoing narrative follows Eisen and his companions as they encounter various heroes from the original hundred, each of whom holds deep admiration for their teacher, while Eisen quietly resolves the problems that arise across the continent. Notable arcs include a journey to the village of the Alraune to obtain a divine tree elixir for Primula Urus, one of the hundred heroes who is building an artifact called the Evil God Meat Radar, and a request to subdue monsters nesting near the sacred tree. The story balances episodic reunions with an overarching sense of a world still shaped by the aftermath of the war against the evil god, centering on Eisen's relationships with his scattered disciples and the unexpected adventures that his retirement-turned-travelogue brings.