Touma, a young wolf beastman who cherishes a peaceful life, serves as a peacekeeping officer (Sadamegai Doshin) in the town of Edo. One night, he encounters a mysterious girl being attacked by thugs. Her name is Rikka, a runaway princess from the distant land of Izumo, carrying a great secret. After rescuing her by chance, Touma ends up sheltering her. Determined to offer a peaceful life to the exhausted Rikka, Touma's resolve is strong—but living with a girl for the first time turns his once-quiet life into a whirlwind of chaos! Thus begins a romantic historical fantasy of a wolf-hearted officer and a rabbit princess.