Kyouhei regains memories of his past life—where he was a powerful sorcerer in another world. Though he now possesses immense magical power, it proves useless in the modern real world. "If it’s no use here, I’ll just go back there," he decides. Reincarnated once more into that other world as Tyler, he begins life anew as an adventurer. Living freely and leisurely with his overwhelming magical power, Tyler enjoys his adventurer days… until one day, Elsa, the leader of the city's top-ranked party Valkyrie, approaches him and says: "I know your secret."