Tập 21: Sự sa ngã vào điên loạn của Shion dẫn đến vụ sát hại, sự phản bội và một cái chết thảm khốc sau khi hallucinating Satoshi's face.

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Shion tricks Keiichi in a phone call and later tricks the townsfolk into believing Keiichi a murder suspect. She quickly realizes that Oishi suspects her instead. She brutally murders Satoko, whom she has been holding captive as punishment for Mion. Then she remembers to her horror that one of Satoshi's last requests was to keep Satoko safe. This drives her deeper into madness. Shion lures Keiichi to the dungeon and prepares to torture him. Keiichi begs Shion, whom he believes is Mion possessed by Oyashiro, to spare Shion and Mion, which drives Shion to tears, and she tasers Keiichi. Shion frees Mion and takes her to the body disposal well, telling her that Satoshi's body is down there. Mion tells her that their grandmother approved of her relationship with Satoshi, but Shion refuses to believe her. Shion tases Mion again, switches clothes with her and pushes her down the well. She and Keiichi are rescued. Shion starts to hallucinate. She visits Keiichi and gravely wounds him. Shion hastily returns to her apartment by scaling the side of the building, and slips and falls to her death. As she falls, she imagines seeing Satoshi's face in the moon, and apologizes to him before she hits the ground. (Source: Wikipedia)