[As a Tuner, he notices the difference, but doesn't mind. Even though he seems different, Akito knows he's still Tsuna. That's all that matters.
He lifts a hand and gently holds the one resting on his cheek] It's alright Tsuna-kun. You don't have to apologise. [He smiles apologetically] You didn't know it'd scare me. [There's...so many things he needs to tell Tsuna, that the other deserves to know, as his special one, but...Akito's afraid of doing that. Of what Tsuna's reaction will be]