A famous senior fellow student v. a junior who doesn’t recognize him
The male lead secretly flirts with the female lead, and once she’s sure of her feelings, she flirts right back.
At first, he leans his head against the doorway, casually runs a hand through his hair, and reveals his collarbone. The female lead panics and runs away.
Later, the female lead looks at the male lead, who can’t bring himself to meet her eyes, and asks, “Do you prefer me calling you Mr. Qi, Baby, or Hubby?” He’s so embarrassed he still can’t look at her.