Nogi Wakaba wa Yuusha de Aru

The narrative is set 300 years prior to the present, in 2018, marking the beginning of the Divine Era. Six individuals are recognized as the first Hero Team: Nogi Wakaba, an ancestor of Nogi Sonoko; Uesato Hinata; Takashima Yuuna; Koori Chikage; Doi Tamako; and Iyojima Anzu. Additional content includes a prelude chapter titled "The Second Hero Diary" featured in Volume 1, and another titled "The Passed Baton" in Volume 2. A separate extra chapter introduces Shiratori Utano as a Hero.