Ep. 4: Disaster Awakening Chapter Three: Pre-established Harmony

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On the day of the Watanagashi Festival, Rika fails to warn Tomitake about his impending death. Meanwhile, Satoko becomes convinced that a mysterious man is stalking her and Rika. Concerned for her friend's safety, Satoko sets traps around the house to detect any intruders. When one of these traps is triggered, her fears are confirmed as she realizes someone is indeed following them. This sequence of events highlights the growing tension and danger surrounding the characters during the festival period, as Satoko takes drastic measures to protect Rika from the unseen threat she believes is targeting them.