Yukio's tail curls around his legs under the hem of his shin-length uniform coat, fur bristling even as he schools his expression into politeness and gives a little, embarrassed sort of laugh. He doesn't want to fight with a stranger, and so he's just trying to diffuse the situation.

"I'm sorry, you mopped over my tail and it startled me."

Intense concentration and focus? Bullshit. The guy isn't paying any attention to anything around him.