Kanade and her brother Souta don't seem to get along, but deep down do like each other. When Souta decides to make something for Kanade for White Day, Hibiki agrees to help her out in making a cake. However, Kanade yells at Souta for making a mess in the kitchen, causing him to become upset and run off, where he is trapped after Siren makes a Negatone out of his cake. As Kanade fights to reach Souta, Hibiki's desire to protect their sibling bonds grants her a new weapon, the Miracle Belltier, which she uses to defeat the Negatone. Afterwards, Kanade apologises to Souta and accepts the gift, only to find it is filled with wasabi.
響は弟がいる奏が羨ましくて、自分も兄弟が欲しいと思う。しかし、奏は弟の奏太に怒ってばかりだった。でも、本当は2人はとても仲良し。奏太は奏に、ホワイトデーのお返しをしようとカップケーキを作っていた。
