Despite being the Hero who defeated the Demon King all by himself, the Sage Cain was feared as the "Trashy Sage" due to his scary face and a slight misunderstanding, and received an exile order from the Kingdom. One day, a package suddenly arrived from the Kingdom to him, who was living a lonely life in a remote frontier. Inside was none other than the Demon King's daughter, Phirionora, who concealed immense magical power! Moreover, by some twist of fate, Cain ends up having to raise that daughter, Phirionora――!?