Tập 15: Tập bốn Nadeko Medusa mô tả hậu quả sau khi Nadeko nuốt bùa chú và đánh bại Koyomi và Shinobu.

Despite Koyomi's warnings, Nadeko swallows the talisman and revives Kuchinawa after Shinobu berates her for once again playing the victim. The story then shifts forward to Nadeko's confrontation with Koyomi and Shinobu at the abandoned temple and it is revealed that she defeated both. Kuchinawa then reveals that he had met Nadeko when she swallowed the talisman and all their previous interactions were fruit of Nadeko's own imagination. It is also revealed that it was Ougi who had filled Nadeko about the talisman's location and that all her movements since then were a ploy to infiltrate into Koyomi's house and secure a key to break into there in secret. As Nadeko is about to kill Koyomi, she answers a call from Hitagi at his phone. Hitagi then reveals that Nadeko must kill her, Shinobu and Koyomi at this order or she may end up being killed by either Hitagi or Shinobu, and in exchange for this information, Nadeko agrees to return to kill them all at the day of their graduation. Six months later, the day of graduation is at hand, and Nadeko waits at the polar snake shrine for Koyomi, Hitagi and Shinobu, who accompainied by Suruga and Tsubasa, appear to confront her. (Source: Wikipedia)

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