They certainly do know where that leads don't they? There is a flash of recognition- for the memory, mostly, of how it 'ended' in both their cases. At least before things turned impossibly for the better.

He listens carefully, at the explanation of the boards. Whether he knew or not already, he doesn't say. Instead..

The boy's eyes widen, even as he carefully takes the notebook. A two-way book...

Noa's eyes linger over it's cover, and finally he manages to say- "...Thank you, Seto. I..." He continues holding the book, but manages a somewhat stiff nod. "...I suppose we'll be seeing more of the other from here on."

....Just has to get used to it is all.