乃木若葉は勇者である (Associated Names)

The story of Nogi Wakaba is a Hero takes place 300 years in the past, in the first days of the Divine Era. There are six main characters who form the very first Hero Team: Nogi Wakaba, Kamisato Hinata, Takashima Yuna, Gun Chikage, Doi Tamako and Iyoshima Anzu.