Noble Academy prepares for Family Day, in which the students' families are invited on campus, with Haruka eager to see both her parents and her little sister Momoka. To her shock, however, Haruka finds that Momoka seems to show little interest in the school and is acting coldly towards Haruka and her friends. When Haruka scolds her for being rude to her friends, Momoka lashes out at her and runs off, with Minami theorising that she may be lonely due to living apart from her big sister. Kirara manages to catch up to Momoka and assure her that Haruka still cares about her dearly, allowing the two sisters to make up. Just then, Twilight and Shut appear and target Haruka's family to create a Dorayaki Zetsuborg. Finding a handmade tiara that Momoka had made for her, Haruka finds the strength to stand up to the Zetsuborg and defeat it, determined to do her best with her family's support.