Tsukishima may have been in the room but his mind was somewhere else so it took him a moment to nod back at Tezuka. He wasn't having difficulty with his studies, not really, but this was Harvard so he had to think more creatively on how to tackle the case assigned to him. He didn't have to be the best, but he would make sure he had a shot.

He was so absorbed at running scenarios in his head as he threw his clothes into the washer so he jumped a little when Tezuka spoke to him.

"Yes?" He shut the door and turned the machine on.