Yuuki Yuuna wa Yuusha-bu Shozoku

The story takes place in the era of the gods, year 300. Yuuna Yuuki lives an ordinary life as a second year middle school student, but she's also a member of the "Hero Club," where club activities involve dealing with a mysterious being called "Vertex." Aired along side Yuuki Yuuna wa Yuusha de Aru: Washio Sumi no Shou Movie 3 - Yakusoku.

Yuuna Yuuki is an ordinary second-year middle school student. She gets up in the morning, gets ready for school, goes to classes, participates in club activities, and has fun with her friends. But there is one extraordinary thing about Yuuki — she belongs to the “Brave Hero Club.” What does the Brave Hero Club do? Who is the mysterious being called “Vertex?” Yuuki Yuuna and her friends’ story takes place in Year 300, Era of the Gods.

The second season of Yuuki Yuuna wa Yuusha de Aru . Having fulfilled their destiny during the events of Yuuki Yuuna wa Yuusha de Aru, Sanshu Middle School's Hero Club—consisting of Yuuna Yuuki, Karin Miyoshi, and siblings Fuu and Itsuki Inubouzaki—is back in full swing, helping out those in need wherever they can. They have also gained a new member, a hero from the past named Sonoko Nogi. But eventually they notice that someone who should be among them, Mimori Tougou, is missing; any trace of her existence is completely gone, save for the girls' memories. With no leads on Tougou's whereabouts, the girls regain the ability to transform and begin the desperate search for their lost friend. But what they find is more shocking than any of them could ever have imagined, and the consequences of their actions begin to change life as they know it.

It is the year 300 of the Divine Era. The world inside the Shinju where all Heroes and Mikos were summoned from all ages during the crisis of the Shinju. They gathered in Sanshuu Middle School Hero Club and have transformed it into a large family with a total of 27 members. The club president, Inubouzaki Fuu who gathered these powerful friends together, announces the development of the long-awaited Hero Club Udon.