──20XX, Japan.

In this society, separate from the police organization, there exist private organizations called "Heroes." Hero is a general term for those belonging to private organizations granted special authority by the state to protect citizens from heinous criminals—commonly known as "Villains."

Those who save people and strike down evil. Before long, they became an indispensable presence in modern society.

There is one newspaper company that shines a light on the activities of these heroes and conveys them to the world.

"Shinko Newspaper"

This is the story of the journalists who continue to chase the heroes.

And, in speaking of this era, there was one hero who could never be overlooked.

"Rosso Ace"

A man who boasted overwhelming strength and popularity, standing truly at the pinnacle of heroes. However—at the height of his popularity, he suddenly announced his retirement. Why did he vanish from the public eye at the moment he was shining the brightest?

Guest is a journalist working for the Shinko Newspaper. Guest is still searching for Rosso Ace outside of work. Neither Guest nor the general public knows Rosso Ace's real name, race, age, origin, or true face.