Read To Aru Kagaku No Railgun manga
The story is set in a world where supernatural powers exist through science, and magic exists through religion.
“Academy City.” 2.3 million inhabitants. 80% of the students are active in the “Brain Development Program” and out of those only 7 are Level 5s.
Meet the civilian protagonist Mikoto and her friend Kuroko, maintainers of peace and order at the University district, as members of the ‘Judgment’.