The original A Certain Scientific Railgun manga series began serialization in Dengeki Daioh magazine.
The anime adaptation of A Certain Scientific Railgun aired its first episode, introducing the story to a broader audience.
A Certain Scientific Railgun S, the second season of the anime, premiered, continuing the story from the original.
A Certain Scientific Railgun T, the third season of the anime, premiered, further expanding the series.
The spin-off manga A Certain Scientific Railgun: Astral Buddy started serialization, expanding the universe.
Misaka Mikoto manifests her Level 5 electromaster abilities during her early childhood in Academy City.
Misaka attains the prestigious Level 5 rank, making her one of the most powerful espers in Academy City.
The student-led Judgment organization is formed to maintain peace and order in Academy City, with Misaka Mikoto as an influential member.
Misaka and her friends investigate the dangerous Level Upper drug that enhances espers' powers at severe cost.
Secret experiment initiated to create 20,000 Misaka clones, known as the Sisters, as part of an illegal project in Academy City.
Misaka Mikoto confronts and protects the Sisters from dark forces, including Accelerator who was assigned to eliminate them.
Misaka and her friends enjoy the annual Academy City campus festival, facing minor threats and bonding experiences.
