Yuuki Yuuna wa Yuusha de Aru: Washio Sumi no Shou 3 - Yakusoku
Japanese title: 結城友奈は勇者である -鷲尾須美の章- 第３章「やくそく」
Type: Movie
Episodes: 1
Source: Light novel
Genres: Drama
Studios: Studio Gokumi
Producers: Pony Canyon
Duration: 48 min
Rating: PG-13 - Teens 13 or older

The third and final movie in the Washio Sumi no Shou trilogy.