[ The more Sion does that the louder Naoto gets and after a moment it occurs to him that maybe, maybe there is a point here where where talking is going to be important, so after some more squirming he makes a muffled quiet noise through his fingers—

... then. realizes he needs those out of his mouth first and— ]

A-ah— w-wait I, I'm—

[ I WONDER WHAT HE COULD BE TRYING TO CONVEY ]