His reaction had been mostly internal. He was still wrestling with the ability to actually show how he felt. It seemed like those reactions were being muffled so they weren't quite making it to his expression. He was close enough for it though, and so he slipped his hand into K's despite not looking up at him.

"... Do you still think of me as human?"

Viktor still felt like a raw nerve in that everything was affecting him, but he never knew when that storm of chaotic emotion would make him feel like he should be laughing or feel like he should be crying. Sometimes both at the same time. So right now, it's K who is the only solid thing left in the storm, and Viktor intends to cling to K as much as he possibly can.