The story of the first hero, Nogi Wakaba, who raced through the era 300 years before the world of "Yuki Yuna is a Hero," is finally complete in this comic adaptation! Kuni Chikage, who lost her mental balance and had her hero qualifications revoked. In her eyes, which relied on being a hero more than anyone else, a dark light dwells... And Wakaba and her friends, who have lost their fighting power, are forced to struggle against the Vertex. What is the scene that the heroes witness at the end of a battle that reaches its extremes? The baton of courage is passed on to the next generation of heroes――.