Nogi Wakaba wa Yuusha de Aru乃木若葉は勇者である

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.