[Great, now Souji has to try to keep his cool again, but his awkwardness and embarrassment is only made obvious by a small noise he makes at seeing Ian without his helmet again. He really is learning to both hate and appreciate how self-aware Ian is about his own attractiveness.
When the comment comes, Souji has to admit he could have expected it. He shrugs his shoulders and turns to put his back to Ian, tilting his head to the side and down a bit.]
Why are you checking?
[Not that he's bothered by it. There are multiple reasons they put this sort of procedure in place, he's just curious as to why Ian's calling for it now.]