A smartphone game launched in 2017 and received a short anime series titled Yuki Yuna Is a Hero: Churutto!, which aired between April and June 2021.

[4] Yūna, Mimori, Fū, and Itsuki are all members of the Sanshu Middle School Hero Club (讃州中学勇者部, Sanshū Chūgaku Yūsha-bu), dedicating themselves to helping those in need.

One day in their regular daily lives, the Hero Club members are suddenly caught in an explosion of light and transported to a strange forest, where they encounter mysterious monsters known as Vertex which seek to destroy the Shinju (神樹, "Divine Tree"), the guardian deity which protects and blesses humanity.

Using a special phone application granted by Taisha, an organization dedicated to the Shinju, Yuna and her friends must transform into "heroes" with magical powers to protect their world from imminent destruction.

Washio Sumi is a Hero), written by Takahiro and illustrated by Bunbun, was serialized in ASCII Media Works' Dengeki G's Magazine between April 30, 2014[7] and November 29, 2014.

[11] Another light novel written by Akashiro, Kusunoki Mebuki wa Yūsha de Aru, began serialization in Dengeki G's Magazine on June 30, 2017.

A manga adaptation of Washio Sumi wa Yūsha de Aru, illustrated by Mottsun*, began serialization in ASCII Media Works' Dengeki G's Comic from June 30, 2014.

The anime was licensed in North America by Pony Canyon's label for the region, Ponycan USA, which released the series with an English dub on DVD and Blu-ray on April 10, 2015.

[24] A short anime based on the Yūki Yūna wa Yūsha de Aru Hanayui no Kirameki smartphone game, titled Yuki Yuna Is a Hero: Churutto!, was announced on May 26, 2020.

[26][27] A third anime season titled The Great Mankai Chapter (大満開の章, Dai-Mankai no Shō) was announced, with the main staff and cast members reprising their roles.

[30] Two visual novels for Windows, developed by Minato Soft and featuring scenarios written by Takahiro and Osamu Murata, are bundled with the first and sixth DVD and Blu-ray Disc volumes of the anime series released on December 17, 2014, and May 20, 2015, respectively.

[31][32] An action video game developed by FuRyu titled Yūki Yūna wa Yūsha de Aru: Jukai no Kioku (結城友奈は勇者である 樹海の記憶, lit.

[33][34] A crossover mobile game titled Yuuki Yuuna is a Hero: Bouquet of Brilliance (結城友奈は勇者である 花結いのきらめき, Yūki Yūna wa Yūsha de Aru: Hanayui no Kirameki), or YuYuYui for short, was released on June 8, 2017, for iOS and Android.