[kj1980]

[The Watanagashi fragment is required.]

Spoiler:

This fragment is where Sonozaki Shion goes mad taken by Rule X.

With no room for sympathy, this is a painful fragment where one can only have pity.
…But no doubt it distinctly identifies the keyhole to the pad lock destined as Rule Z.

That keyhole will eventually be pried opened by Maebara Keiichi who becomes the Key.
Then, just as Sonozaki Mion wished for, …he will cleanse this shrouded air that has starched the village.

This fragment also is an important session where one is to learn from.
Sonozaki Shion learns from this fragment, and hereafter, becomes a strong ally of Hojou Satoko.

……Come to think of it, Hojou Satoko could be a piece that represents Rule Z in its entirety.

If she is not saved, Rule Z will not be broken.
By saving her, it exhibits that Rule Z has been broken.

What this fragment demonstrates, is that alone.
What Sonozaki Shion learned by gambling her life, is that alone.

But, this is something very important, now that I think of it.
Every time I see Satoko and Shion joking about pumpkins, you see.