The Takakura siblings are enjoying Takoyaki together and happy with the news that Himari will soon be released from hospital when the magic hat posesses Himari again for another Survival Strategy meeting with her brothers and insists that their ordeal will not be over until the Penguin-Drum is retrieved. Meanwhile, Yuri and Tabuki reminisces about their childhood days with Momoka and while Yuri is unable to forgive the siblings for their parents' crime, Tabuki tries to dissuade her. In the next day, Himari leaves by herself with Ringo for shopping much to Kanba and Shouma's despair as they are informed that she must take another dose of her medicine before sunset. While the brothers look for Himari, Ringo receives a call from Yuri who invites her and Himari for a meeting. Yuri waits for Himari, but is intercepted by Masako instead, and the two start fighting for the two halves of the diary, while Himari and Ringo are approached by Tabuki who invites them to a construction site where he claims he will finally bring punishment to the Takakura family.
Shōma e Kanba sono in ospedale da Himari per prepararle un pranzo a base di takoyaki. Mentre i ragazzi riflettono sul fatto che con la cura di Sanetoshi, Himari sta meglio e non sono più obbligati a cercare oggetti misteriosi, la piccola si trasforma nell'entità del cappello.
いつものように陽毬の病室に見舞いに行く冠葉と晶馬。薬のおかげか最近調子がいいという陽毬から、もうすぐ退院できるかもしれないという報告を受ける。ほっとする２人だったが、突如、ペンギン帽をかぶった陽毬に生存戦略を告げられる。
もはや一刻の猶予もないこと、このままピングドラムを放置すれば、一番大切にしているものが損なわれるなどと宣告されてしまう。
