New key visual also revealed for film premiering on July 8

Pony Canyon began streaming a promotional video on Saturday for the Yūki Yūna wa Yūsha de Aru: Washio Sumi no Shō (Yuki Yuna Is a Hero: Washio Sumi Chapter) theatrical anime project's third and final film, titled Yūki Yūna wa Yūsha de Aru: Washio Sumi no Shō: Yakusoku (Yuki Yuna Is a Hero: Washio Sumi Chapter: Promise). The video previews Suzuko Mimori's song "Sakiwafu Hana"

The anime's official website also posted a new key visual for the film trilogy.

The film will open on July 8.

The first film, Yūki Yūna wa Yūsha de Aru: Washio Sumi no Shō: Tomodachi (Friend), opened in Japan on March 18. The second film, Yūki Yūna wa Yūsha de Aru: Washio Sumi no Shō: Tamashii (Soul), opened on April 15.

The anime stars:

Suzuko Mimori as Sumi Washio

Kana Hanazawa as Sonoko Nogi

Yumiri Hanamori as Gin Minowa

The anime films adapt Takahiro and illustrator BUNBUN's illustrated novel series Washio Sumi wa Yūsha de Aru (Washio Sumi is a Hero). Project 2H is credited as the original creator, Takahiro (Minato Soft) is credited with the original plan designs, and BUNBUN is credited with the original character designs. Seiji Kishi, who directed the first anime season, is the chief director. Daisei Fukuoka (Danganronpa 3: The End of Hope's Peak High School: Despair Arc, Danganronpa 3: The End of Hope's Peak High School: Future Arc) is directing the anime at Studio Gokumi. Makoto Uezu is returning to handle the series composition, and Uezu and Takahiro are writing the scripts. Takahiro Sakai is returning to adapt BUNBUN's designs for animation and is also serving as chief animation director. D.K&JWWORKS is in charge of the concept art, and Keiichi Okabe and MONACA are returning to compose the music. Pony Canyon is distributing the anime.

The films are one part of the overall second season of the anime series. The season will premiere on television in October in two parts. Yuki Yuna wa Yūsha de Aru: Washio Sumi no Shō takes the three films and will screen them as six television episodes. Yuki Yuna wa Yūsha de Aru: Yūsha no Shō will then air as a direct sequel to the first season.

The first anime's story takes place in the era of the gods, year 300. Yūna Yūki 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."

The 12-episode anime series premiered in October 2014, and Crunchyroll streamed the anime as it aired in Japan. Ponycan USA released the anime in three Blu-ray Disc/DVD combo packs in North America in 2015.