* Based on the light novel series Washio Sumi wa Yuusha de Aru written by Takahiro and illustrated by Bunbun.

Two years before Yuki Yuna is a Hero.

Sixth grader Washio Sumi is a hero chosen by the Divine Tree spirit to protect the world. She fulfills her mission while treasuring each day with her classmates Nogi Sonoko and Minowa Gin.

Source: Official page

Note: The TV version of the prior screened 3 movies.

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Sequel: Yuuki Yuuna wa Yuusha de Aru
Alternative version: Yuuki Yuuna wa Yuusha de Aru: Washio Sumi no Shou