A Certain Scientific Railgun's Secret Guardian

The Eighth Level 5: "Eternal Dimension"

A Certain Scientific Railgun S is the main story, while the prequel covers the protagonist's experiences before age thirteen. Also, when Xingmeng's character profile was first created for the A Certain Magical Index side story, it was incomplete, including details about her personality and background. As a result, there are some differences from the main story. The author would like to remind readers of this.