Yuuki Yuuna wa Yuusha de Aru(2014)

Yuuki Yuuna wa Yuusha de Aru

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: Anime News Network)