The Exiled Hero and the Saint

The hero and the holy maiden who successfully defeated the Demon King. A few days later, Cain and Matsurika decided to secretly leave the country. The reason was that the prince and the duke's daughter had each come forward claiming to be the hero and holy maiden respectively, and if things continued as they were, they could only see a future where they themselves would be exploited. Since the proof of being a hero could be used by anyone as long as they read the manual, it didn't really matter if others claimed to be a hero. However, they could foresee that terrible things would happen after this...