Touma, a young wolf beastman who loves a peaceful life, is a regular policeman who protects the peace of the town of Edo. One night, he meets a mysterious girl who is being attacked by thugs. The girl's name is Rikka. She is a princess from the faraway country of Izumo, and is being pursued because she has a big secret. Touma happens to help her and ends up hiding her. Tired of her life on the run, Touma decides to offer peace to Rikka, but living with a girl for the first time is far from peaceful and marks the beginning of a very turbulent life! (Source: Comic Days, translated)

1000 years ago in the Heian Period, the human Princess Shizu and the oni Shuri (also known as Benkei) fell in love and married. When the princess died young, the oni turned to stone in his grief. 1000 years later in the modern day we meet high school girl Shizuko. On her 16th birthday, when she is old enough to marry, she is accosted by Shuri who has awakened from the stone and now claims to be her husband. It turns out that Shizuko is the reincarnation of Princess Shizu. Shizuko is overwhelmed and weirded out by all this. Shuri, meanwhile, declares his everlasting love for Shizuko and resolves to do everything in his power to make her love him again like she did in her past life.

Aika Asakura was about to jump the cliff, but she instead saved a cat. There she encounters Hotoka Houshido, a veterinarian that saved the cat's life. However, saving this little critter had unfortunately left her in debt, so he had arranged for her to work and live with him…