Yuuki Yuuna wa Yuusha de Aru: Yuusha no Shou

The Hero Club from Sanshu Middle School, now including a historical hero named Sonoko Nogi, continues to assist others after completing their initial mission. Members Yuuna Yuuki, Karin Miyoshi, and the Inubouzaki siblings notice the absence of Mimori Tougou, whose existence appears erased except for their memories. Unable to locate her, they regain their transformation abilities and search for her. Their investigation leads to unexpected revelations that significantly alter their reality.