Toaru Majutsu no Index Light Novel Volume 12 was first published on January 10, 2007. It is the first part of the two-novel storyline that occurs on September 30. As the first part of the story it mostly focuses on slice-and-life and comedic situations between the characters.

Publisher's SummaryEdit

September 30 — the day where students in Academy City change into their Winter uniforms. Everything is in a hurry, while Tokiwadai Middle School's elite Level 5, Misaka Mikoto, is in front of a concert hall. She is waiting for someone.

However, "...He won't come."

"That guy" who should be in the punishment game can't be seen anywhere. Misaka heaves a sigh, carrying a flimsy schoolbag and a violin case in her arms as she waits.

When Kamijou Touma and Misaka Mikoto meet, the school-life (love) comedy about the punishment game shall begin!


  • Prologue: Shirai Kuroko, Pillow, and Bed. Suffering_of_a_Negligee.
  • Chapter 1: Sunny Morning Classes — Winter_Clothes.
  • Chapter 2: What Kind of Penalty Game? — Pair_Contract.
  • Chapter 3: Misaka and Misaka's Younger Sister — Sister_and_Sisters.
  • Chapter 4: Gently Crossing Pairs — Boy_Meets_Girl(x2).
  • Chapter 5: Sunset Unknowingly Passing By — Hard_Way,Hard_Luck.

Localized ReleasesEdit


A Certain Magical Index Volume 12
A Certain Magical Index Light Novel v12 cover

Date of Release August 22, 2017[2]
ISBN ISBN 978-0-316-36002-9[2]
Number of Pages 192 pages
September 30th. As the seasons change in Academy City, so do the seasonal clothes. Mikoto Misaka, talented esper student of the elite Tokiwadai Middle School that stands above the hustle and bustle of the city, waits in front of the concert hall for her companion. But...he never arrives. There is no trace at all of that young man who was supposed to show up to accept his punishment game. Mikoto sighs as she cradles her too-thin schoolbag and the violin case she'd been holding all the while but now--

When Touma Kamijou and Mikoto Misaka finally cross paths, the school comedy that revolves around a punishment game will begin!