- Country: Japan
- Genres: Animation
- Release: 2017-07-08
- Director: N/A
- Writers: N/A
- Language: Japanese
- Stars: N/A
- Runtime: 48 min
- Awards: N/A
- AKA: Yuuki Yuuna wa yuusha de aru: Washio Sumi no shou dai-2-shou 'Yakusoku' (Germany) , Yuuki Yuuna wa yuusha de aru: Washio Sumi no shou dai-2-shou 'Yakusoku' , 結城友奈は勇者である 鷲尾須美の章 第3章「やくそく」 (Japan)
- Plot: N/A
- IMDB:tt7092940
Yuuki Yuuna wa yuusha de aru: Washio Sumi no shou dai-2-shou ‘Yakusoku’ Cast · · · ALL
Suzuko Mimori
Washio Sumi / Tougou Mimori
Kana Hanazawa
Nogi Sonoko
Rina Sato
Aki-sensei
Haruka Terui
Yuuki Yuuna