Bitty practically runs away from him, and Derek isn't sure what he's said. He blinks and follows after him with a furrowed brow, wondering why he suddenly smells so anxious. It gets detrimentally worse once he stops moving, and his heart starts pounding away.

"What is it?" Derek asks when he approaches, but he follows his gaze upward and his lips thin out when he catches sight of the mistletoe. "Hey, Bitty. It's okay. I was stuck under this the other day. Take a breath. You're going to be fine."