The Warui family's only daughter, Rejyō, is a spoiled young lady who constantly stirs up trouble with her bold pronouncements and willful behavior. Behind the scenes, however, her father quietly orchestrates everything to ensure she never faces real consequences. He is an extraordinarily powerful man, and Rejyō knows it: with him by her side, she feels truly invincible. The story follows their daily lives as Rejyō insists on acting like a classic villainess while her father subtly protects her, resolves the messes she creates, and supports her in achieving her wishes.

The setting is a fantasy world of noble houses, magic, and social intrigue. Rejyō's greatest desire is to make friends, but her abrasive personality often gets in the way. Through her father's discreet assistance and her own earnest efforts, she eventually gains companions. However, a suspicious presence begins to creep closer to the peaceful life Rejyō has built. Her father, together with his old acquaintance Nihīru—a mage who also dotes on Rejyō in his own way—must confront the emerging threat to keep her safe. The narrative balances warm, humorous father-daughter moments with growing external dangers, as the strongest dad in the kingdom does whatever it takes to protect his little girl.