Yuuki Yuuna wa Yuusha de Aru: Washio Sumi no Shou (Yuki Yuna is a Hero: Chapter of Washio Sumi) Soundtrack.

Check out Miyoshi Karin for the Yuuki Yuuna wa Yuusha de Aru (Yuki Yuna is a Hero) Soundtrack.
youtube.com/channel/UCL51h8vSqF3J6EHrS6iJwFw