Yuuki Yuuna is a Hero: Washio Sumi's Chapter 3 - Promise (2017) is a Animation film that follows in the year 298 of the Divine Era, elementary school girls Washio Sumi, Nogi Sonoko, and Minowa Gin are tasked with an important mission. They are to become heroes and fight Vertex, a mysterious enemy that is attacking Shinju-sama, the god tree that protects Shikoku, the only area in the world that is still habitable. What they don't know, is that this fight will cost them more than they could have ever imagined. Yuuki Yuuna is a Hero: Washio Sumi's Chapter 3 - Promise is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 4.5 out of 10 from 2 votes. Fans of animation movies may also want to explore similar titles below.