Act coquettish with me

No one is unaware of the young master of the Lu family, Lu Xiu. He's known for his rebellious character, assertive personality, and wild, unrestrained nature. They say nobody can control him. Only Su Qing knows that the big demon would, for the sake of a casual word from her, run around the city in the dead of night just to buy her favorite cake. He would let his grades slip just to get into the top ten to attend the same university as her. But he'll never belong to himself again...
Years later, at a high school reunion, one moment he's still trending, and the next he's right before her eyes. He lazily leans on the couch, his gaze cold and distant. Suddenly, she feels a shadow looming beside her, followed by a hoarse interrogation: "Su Qing, don't you dare play with me this time."
After reconciling...
Lu Xiu happens to notice Su Qing holding a white bottle and searches online, only to find the shocking result - it's a sedative.
"Don't ever leave me again," Su Qing says.
A tear rolls down Lu Xiu's cheek as he holds onto Su Qing tightly. "I'm yours, always have been."