Ranked Hero

In this story year, demons have risen to the surface of the earth, the job of "Hero" was also created as a solution to protect humanity from the attacks of demons. But because the risks are obvious, there aren't many people who want to be heroes. Only people who are strong, brave, and have skills want to be heroes. One day. There was a high school boy who was geeky and famous for not being talented at anything. Expressing his aspirations in front of the class, he wanted to be a hero. Everyone laughed at him, but only his teacher and some of his friends did not laugh. Can the boy achieve his goal? In what ways can he achieve it?