Toaru Majutsu no Index Light Novel Volume 15

Chapters

 * Prologue: 愛しい貴方へ極上の鉛弾を　Management.
 * Chapter 1: 誰にも聞こえぬ確かな号砲　Compass.
 * Chapter 2: ゆっくりと動き出した者達　Hikoboshi_Ⅱ.
 * Chapter 3: 超能力を封じられた土地で　Reformatory.
 * Chapter 4: 自重と誇りの紙一重の違い　Enemy_Level5.
 * Chapter 5: 最強の黒い翼に打ち勝つ者　Dark_Matter.
 * Epilogue: 生き残った者が得る戦利品　Nano_Size_Data.

Summary
Chaos breaks out in Academy City when the city's underground organizations battle and race against time to obtain an important artifact before the others. In this volume it's completely Accelerator centered. We get to see various underground organizations such as GROUP, ITEM, SCHOOL, MEMBER, BLOCK. Volume 15 is also where we learn about Kakine Teitoku, the 2nd ranked level 5 who harbours extreme resentment towards Accelerator as he wanted to be used for the level 6 shift project. Many groups battle it out and many crumble. There are a lot of deaths in this volume and extreme foreshadowing such as Kakine figuring out what "awakening" is but before he can explain Accelerator smashes him into the ground. Mugino Shizure also kills Frenda due to her being a traitor and trying to defect to SCHOOL. Hamazura takes out Mugino. GROUP was the only team left intact by the end of this volume.