Toaru Majutsu no Index Light Novel Volume 12

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-of-life and comedic situations between the characters.

Publisher's Summary
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!

Chapters

 * 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.