Lestrade sighed deeply, rubbing his face as he blindly reached for his coffee mug, -Sherlock had actually given it to his for Christmas, though he deeply suspected John had bought it and told Sherlock to give it to him, seeing as he had received it a week before the holiday, without it being wrapped- and found in empty. Lestrade almost groaned in frustration. Today was turning out to be a horrible day.
He glanced at the man opposite him, who grinned in return. Lestrade barely restrained himself from leaning over the desk and punching him. No one, absolutely no one should be that happy at 6 o' clock on a Monday morning.
Lestrade settled for narrowing his eyes, and turning back to his computer.
After five minutes of not actually doing any work, Lestrade turned back to the man narrowing his eyes at the grin that instantly went to his face when Lestrade showed him attention.
"So, what's your name again?" Lestrade grumbled
"Gabriel" he replied, pulling a lollypop from his jacket pocket.