Toaru Kagaku no Railgun SS: Liberal Arts City refers to the story that was released in parts on limited edition DVDs and Blu-rays of Toaru Majutsu no Index anime. The story consists of eight parts, and can easily equate to a regular Index novel in length.
The story is in Liberal Arts City that takes place in the time period between September 3rd to 10th. Academy City have a exchange program with the rest of the world that allows some students to travel for this week to other places, and some students are allowed into Academy City during this time.
- It is shown that Mikoto can use water to create wings and fly, using one pair for propulsion and another two, smaller pairs for navigation.
- This series of events is what leads to Xochitl's conflict with Etzali in Volume 15, and Tochtli's fate as a puppet in Volume 19.