Maris picked up a battered, wounded dog and decided to live together with it at her home. However, after a certain incident, it was revealed that Maris’s dog was actually the missing “Hero Who Saved the Nation,” Zerek Windsorcoat! Usually silent and indifferent, Zerek shocked those around him by openly showing possessiveness toward Maris. But Maris was shocked for an entirely different reason. “To me, no matter how I look at him, he’s just a dog!?” This mysterious and extraordinary relationship between the two eventually develops into a major incident connected to the royal family’s legend—!?