After being reborn, Gu Nanzhi binds herself to a system. On the surface, she's a sweet, gentle good girl, but in reality, she's a mysterious racing driver and a skilled fighter. At a dinner arranged to break off an engagement, a tiny movement she makes while catching a teacup arouses Lu Qi's suspicions, and the broken engagement unexpectedly turns into an engagement announcement. From then on, the two embark on a cat-and-mouse game: he busies himself looking for flaws in her act, while she puts all her effort into pretending to be innocent. But when her best friend is in danger, she disregards the system's punishment and drops her disguise, boldly declaring, "Even if I'm a fierce flower, I'm still the precious little flower Young Master Lu keeps." Amid countless twists and an intense battle of wits, the two gradually grow closer as they test each other, beginning a sweet and touching love story.