Fully transformed into an aparition, Nadeko confronts Shinobu and a battered Koyomi who attack with the intention of killing her, and envious of their relationship, she stabs Koyomi's heart. The story then retrocedes to some days before, in Halloween, when Nadeko, on her way to school has a short encounter with Ougi Oshino, Meme Oshino's nephew, who is also a first year student Koyomi's high school. For some reason, Ougi claims that it is about time for Nadeko to stop always playing the victim before she leaves. At her school, Nadeko starts having visions of white snakes and calls Koyomi for advice, and they agree to meet at 10 PM at his house, as by that time Shinobu must be awake to provide some help. Soon after, Nadeko hears the voice of a snake instructing her to meet it at the shrine where she used to kill snakes instead and there it reveals itself as the giant apparition snake, Kuchinawa, who demands compensation for its fellow white snakes she killed by asking for a favor, to which she agrees.
詐欺師・貝木泥舟の「おまじない」によりギスギスしている千石撫子の学校のクラス。
そのため、毎日憂鬱な気分で登校している撫子だったが、そんなある日、彼女はあちこちで白い蛇の姿を見かけるようになる。
하얀 뱀이 나타나는 환각을 보게 된 나데코는 코요미 오빠에게 전화를 건다.
코요미 오빠는 당장 해가 없으면 저녁에 시노부의 힘을 빌려 해결하자고 하는데...
나데코는 코요미 오빠를 기다리지 않고 뱀이 시키는대로 키타시라헤비 신사로 향한다.
诈欺师‧贝木泥舟的「咒语」把千石抚子班上的气氛弄得非常紧张。因为这样，抚子每天都很郁闷的去上学校上学，就在有一天，她突然变得到处都看得到白蛇的身影。
Complètement transformée en singularité, Nadeko confronte Shinobu ainsi que Koyomi qui l'attaque avec l'intention de la tuer, jalouse de leur relation, elle poignarde le cœur de Koyomi.
Qualche giorno prima Nadeko sta andando a scuola quando incontra Ōgi Oshino; sebbene Nadeko non si ricordi di averla mai conosciuta, Ōgi si presenta come la nipote di Meme e dimostra di essere a conoscenza dei suoi trascorsi. A scuola e a casa Nadeko inizia ad avere delle allucinazioni di piccoli serpenti bianchi e decide pertanto di chiamare Koyomi, il quale la rassicura che insieme a Shinobu l'avrebbe incontrata alla sera per cercare di risolvere il problema...
