I don't understand the chap 8's story -.-"

same here!

The human's forever is shorter than the fox's forever because he is immortal. By the time he realized that, it was already too late. He was only a child then so he didn't know.

Or at least that's how I see it.

I agree with cheese.. Poor shiba.. He not know life span human and fox different... Oh my kokoro is hurt...

I completely agree with you logic. It makes sense if you think about it like that. Since the fox was a demon who fell in love with a human and that always ends sadly.