Kyouya wasn't blind, and did notice Katou staring a bit. That was unexpected, but really unimportant. From Katou's behavior, he'd never gotten any impression Katou had any designs on him, so he didn't care if Katou checked him out as long as he remained professional.

"Fine," he said, relaxing into the massage. "Just a bit higher--" He knew he had a knot there, he was far too used to impromptu massages from Tamaki, who was surprisingly good at it. Or maybe he just felt less tense with Tamaki doing this than with Katou. Kyouya was still fairly stiff, since he really didn't relax easily.