Toaru Majutsu no Index Light Novel Volume 05 was first published on April 10, 2005. It features three separate stories occurring in a single day, two dealing with magic side with Touma as the protagonist, and one with the science side featuring Accelerator for the first time in protagonistic role.
That day, Accelerator meets a strange little girl on a back alley.The girl somewhat possesses a familiar face...
That day, Misaka Mikoto invites a young man on a date behind her school dormitory.
That day, Kamijou Touma experiences his unlucky first month at his home. The main reason is that he was not able to do the pile of homework given to him for summer vacation.
August 31. The last day of summer vacation in Academy City. Each of their stories shall unfold!
- Prologue: Night of Opening. — Good_Bye_Yesterday.
- Chapter 1: A Certain Scientific One-way Road. — Last_Order.
- Chapter 2: A Certain Ojou's Railgun. — Doubt_Lovers.
- Chapter 3: A Certain Misaka's Final Signal. — Tender_or_Sugary.
- Chapter 4: A Certain Freeloading Index. — Arrow_Made_of_AZUSA
- Epilogue: Night of Ending. — Welcome_to_Tomorrow
|어떤 마술의 금서목록 5|
|Release Date||August 9, 2007|
|Number of Pages||312 pages|
| 8월 31일. 액셀러레이터(일방통행)는 골목길 뒤에서 이상한 소녀와 만났다.|
그 소녀는 어디선가 본 듯한 얼굴이었는데─.
|Release Date||  August 27, 2008|
July 27, 2012
|ISBN-13|| ISBN 978-986-174-789-7 |
御坂美琴這天在宿舍前遇到一個男生，對方竟表示要跟她約會── 至於上条當麻在同一天，則是有預感一天的不幸即將開始。 因為他發現暑假作業根本還沒寫── 8月31日，學園都市的暑假最後一天，他們各自的故事揭開了序幕…
|A Certain Magical Index Volume 5|
|Release Date||November 17, 2015|
|Number of Pages||224 pages|
|August 31. The day Accelerator meets a strange girl in a back alley and he's sure he's seen her somewhere before. The day Mikoto Misaka finds herself asked on a date by a very pleasant young man. That same day, Touma Kamijou awakes with an especially unlucky feeling. The reason: He's just realized he has completely forgotten to do any of his summer homework. Three characters, three stories, and one last day of summer vacation!|