Yuki Yuna is a Hero: The Hero Chapter is a tV series anime that premiered in fall 2017, produced by Studio Gokumi.

About the production: the story comes from an original script, there are 6 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, drama, fantasy, mahou shoujo, psychological and slice of life, with themes such as Magic, Female Protagonist, Henshin and Gods.

On AniList, Yuki Yuna is a Hero: The Hero Chapter has an average score of 76%, a very good score, and appears on 15,904 users' lists.

The franchise continues in or follows from: Yuuki Yuuna wa Yuusha de Aru and Yuuki Yuuna wa Yuusha de Aru: Dai-Mankai no Shou.

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. (Source: MAL Rewrite)

Official synopsis from AniList.