The incredibly strong girl, To Bong-sun, is in love with Kuk-tu, a pedant and a bore, so she does her best to fit his ideal type — to be sweet, charming, and graceful. That is, ordinary. But Bong-sun is still unusual, so she gets a job as a bodyguard for the heir of a wealthy family, An Min-hyuk. And he is the complete opposite of her beloved: impulsive, arrogant, and spoiled.