Rika continues to bask in the spotlight of adoration at St. Lucia, to the point Satoko feels compelled to confront her in the main hall. Rika’s cronies come to her defense first, but Rika herself doesn’t suffer Satoko’s rudeness, and promises to “make time for her” later. When those cronies badmouth Satoko behind her back, Rika at least defends her friend, saying she’s in a foul mood because her grades have dropped and she’s doubting herself.
Rika believes Satoko will eventually pull out of her nosedive on her own, but that doesn’t happen. Satoko thinks implementing her metal pan prank on a grander scale will help Rika remember the past and their bond, but it all goes pear-shaped one of the pans bloodies a crony. Rika doesn’t rat Satoko out, but one of the cronies does, and Satoko is put in a orange jumpsuit and placed in solitary confinement. Yikes!
While there, all Satoko does is curse the fact she didn’t say “no” when Rika asked her to join her in attending St. Luica. She simply doesn’t fit there, and that’s reinforced when, upon being released, Satoko begins her second year in the “special class”, from which she knows there is no escape.
There’s finally a bright spot in Satoko’s dreary life when she gets a letter from Mion about having a Hinamizawa Country School Game Club Founders’ Reunion. Mion comes to pick Satoko and Rika up in a van, but if she senses the rift between them, she doesn’t mention it, nor do they.
Instead of using the trip to address or resolve that rift, Satoko uses it to forget about St. Lucia altogether. Perhaps she believes there’s no use in speaking to Rika at this point. When Rika finally lets out her trademark “Nipaaa!”, Satoko is both heartened and disheartened, as after everything that’s happened, it almost sounds mocking or patronizing.
Keiichi, Rena, and Mion seem to be exactly the same people, having simply moved their club from Hinamizawa to college they attend together. It’s clear that Satoko would have probably been much happier if she’d gone to high school with them, as she can’t be any less suited for St. Lucia.
After having fun with a card game that includes traps and pranks and penalties, the group heads to the cosplay cafe for a bite, but Satoko tells them to go ahead of her; she wants to have a walk alone in Hinamizawa. It may look pretty much the same, but so much has changed. The more she walks around, the more apparent it is that this is not quite her home anymore either.
Then Satoko comes upon the storeroom, and recalls sneaking in once and wondering if Oyashiro is still angry at her. A strange resonance starts to emanate from within, and when she touches the statue, it crumbles to reveal a broken horn, the source of the resonance.
When Satoko touches that, she’s transported to the same bizarre interdimensional plane where Rika ended up so often. She’s met by someone who looks to be a fully grown-up version of Hanyuu, who addresses Satoko as “child of man.” After punching the walls of her literal prison at St. Lucia wishing she could turn back time and do everything over, now she’ll have that chance!