[ it's not so much that he's oblivious: mei's world tends to revolve around him 99% of the time. rather, he just figured it was some phenomenon of nature and let it be, mostly because there were a million shiny things he could be looking at in the market instead of a bunch of little birds. the first few had caught his attention, but by this point, he's just ignoring them.

mei's brow crinkles when kazuya reaches up to take the bird out of his hair. the gesture's weirdly intimate, and he's about to ask what the hell are you doing, because it's so not kazuya to touch him like that, but before he gets the chance to reach up and try to smack his hand away, he comes away with the bird.

mei looks at it with wide eyes for a second, and then down at it in his hands. ] I can't get rid of these things. My hair's not a nest! [ the bird ignores him, naturally, and mei rolls his eyes (at a bird) (why are you like this) and just makes a pouty face at kazuya when he puts the hat on his head. ]

Maybe for once in your life you could laugh at nothing. That'd be nice. [ says mei, who is just as shitty as him, but whatever. he doesn't thank him for the hat, but that'd be weird. ] It's hot out here! It's not like I put my bare face out in the sun that often, even at home! Unlike you, I'm taking good care of my skin.