"Oh my! I had a family?" Nina, a lonely orphan whose dream was to have a family. One day, while working as a maid, she receives a sudden will from her grandmother and heads into the arms of her family, dreaming of happiness. "A family, I'm so excited! I'll protect my precious family using my maid skills of marksmanship and trap disarming!" However, her grandmother's true identity is none other than the continent's greatest double agent and war hero. Naturally, the information left behind by a dangerous spy tends to attract other spies. * * * 'I am Nina's cousin... pretending to be a spy.' 'I am her cousin... pretending to be a spy.' 'I am her uncle... pretending to be a spy.' 'I am her aunt... pretending to be a spy.' Just as the four family members waiting for Nina chuckled, a pigeon landed lightly on a snorting horse. 'Coo. Coo-rooh-rooh.' (I am a carrier pigeon... pretending to be a spy pigeon.) 'Neigh. Prrr-prrr.' (I am a handsome horse... pretending to be a spy horse.) Could it be because Nina is the granddaughter of the continent's greatest spy? 'When did she learn to handle a magic gun? A maid with a magic gun?' 'Her knife skills are extraordinary. That's the movement of someone who has been trained!' 'How did she notice it was a sleeping poison?' 'Subduing a criminal with a slingshot?' Nina is simply too suspicious and adorable for her fake family to handle.