Toaru Majutsu no Index: Endymion no Kiseki  

とある魔術の禁書目録　エンデュミオンの奇蹟

Prior to the completion of "Endymion", the Academy City space elevator, Touma and Index come across a level 0 girl named Arisa. The Magicians are pursuing her, and they launch an attack on Academy City. Shattoaura leads a unit from Academy City in defense against the assault. Through Stiyl's information, Touma and Index discover that Arisa is crucial to the escalating conflict between Science and Magic. With "Endymion" serving as the backdrop for this narrative, the story commences.