Description:

The story takes place in the era of the gods, year 300. Yuuna Yuuki lives an ordinary life as a second year middle school student, but she's also a member of the "Hero Club," where club activities involve dealing with a mysterious being called "Vertex." (Source: ANN)

Alternative Titles:

結城友奈は勇者部所属, Yuuki Yuuna is a Hero Club Member, Washio Sumi wa Yuusha de Aru