Japan in the near future.
People's lifestyles are not much different from today, but due to complex factors such as environmental hormones, pollution, and radiation, approximately 80% of the population are born with mutations, that is, superpowers.

A society that calls these superpowers 'individuality' and accepts them as natural as inheriting eye color or hair color.
Rather, in this world where it is difficult to find people without superpowers, crimes abusing their powers naturally increase rapidly, and groups that claim to be "lions of justice" to punish such criminals, called "heroes," emerge.

The popularity of the 'hero' group, which carries out its mission as a kind of special police force to protect the peace of the citizens against supernatural crimes, is comparable to that of celebrities.

Accordingly, the most preferred future dream among teenagers is naturally 'hero'.
In this world where superpowers are common, a national institution has been established to train first-class heroes.

The story begins with a 14-year-old boy who dreamed of becoming a hero since he was young, but was not born with superpowers and was only laughed at by those around him. He did not give up and took the entrance exam for UA High School, a national hero school!!