[There's probably a reminder somewhere in the distance that maybe he should be flustered on his part as well, and he could blame it on the hazy feelings that the initial surprise passes when he lets himself settle into Shiro and just. trusts him that this is the best way to go about it. Truthfully he doesn't actually have a grip yet on where exactly they've arrived beyond the initial idea of venturing out, and yet even not quite knowing what's ahead...
He still takes in the reassurance of Shiro's words without doubt or question, a quiet exhale as he closes his eyes.]