[He has to be able to take it off or he literally can't do anything with it, his left hand the way it is... He startles when she exclaims about his hand and his shoulders hunch up toward his ears, sheepish.]

...ah, yeah. I'd call it an old wound but it's really... not that old yet, but it's okay.

[He neatly brings both his hands to his face, pinning the left there with his right so it doesn't flop stupidly forward, and his ears turn an even brighter red.] ...noted. Thank you, Kasumi-san. Um... same... to you.