Following their battle against the Vertex, YUuna, Fuu, Itsuki, and Karin are joined by a fully recovered Sonoko as the Hero Club resumes its normal activities. However, Yuuna starts to get a strange feeling that someone is missing from the equation. The next day, upon experiencing more deja vu, both Yuuna and Sonoko come to the realization that someone has altered their memories to make them forget all about Tougou, as if she never existed. Upon recalling their true memories of Tougou, who had been taking up a masked hero persona to make up for her sins, the girls are left with the question of where she has disappeared to.

　　结城友奈她们在讃州中学勇者部，今天也过着如往常一样的日常，忙于社团活动。

Yuna Yuki dan yang lainnya di Klub Pahlawan Sekolah Menengah Sanshu bekerja keras dalam kegiatan klub mereka, dan menjalani kehidupan sehari-hari mereka seperti biasa.

結城友奈たち讃州中学勇者部は、今日も今日とて部活動に励み日常を過ごしている。

유우나와 산슈 중학교 용자부 회원들은 동아리 활동을 열심히 하면서 평범한 일상생활을 즐긴다.