Derek smiles and shakes his head in amusement at Bitty's greeting, all sincere southern charm and warm smiles. Sometimes Derek forgets how thick Bitty's accent is until he hears him talking to other people, and he's still watching him when he smells something coming from Kate. He looks at her instead, scenting confusion, but he supposes that makes sense. Derek generally feels the same way when faced with bright and happy people.

He inclines his head a bit when she mentions their time away, and then rolls his eyes when she holds up the sweater. "I just thought that this would be easier, and I needed more shampoo from the organic place. Two birds."

Bitty is eyeing the sweater critically, and Derek lets out a huff. "I own a blue shirt. Two of them, in fact. Why do I need a new one?"

Really, though, he doesn't mind being here. This is taking his mind off of other things, and spending time with his friends is rarely something that he won't want to do. Even now. Especially now.