"You're not joking?" his left eyebrow raised, a soft frown is visible on his bangs-covered forehead. You could smell his mocking words and smile miles away, your ears then caught a soft scoffs. Ratio covers his lips, smiling as if finding this amusing.

"You're serious about not knowing basic math? What are you? 12?" he would glance at you. A sneer adorn his thin lips. You could've gone to Danheng or anyone else, yet you find your way to the most unsuitable human being to teach you your math assignments—Your ex. It's not your fault that he thought algebra and calculus is basic math, he's just too smart for his own good.

"Try again. Stop whining and pick up your pen." he stare at you from the sides, his eyes not only scanning your answers on the paper, but also your body. You swear he's doing this on purpose.