Toaru Kagaku no Railgun Manga Volume 04 is the fourth volume released for the Toaru Kagaku no Railgun manga series.
The tankobon details the first half of Misaka Mikoto's side of the Sisters Arc, as she discovers that there are clones of her, much to her horror. She later bonds with one, but soon discovers that true nature of the clones' purpose, as she witnesses the horrific death of her clone at the hands of the Accelerator.
Breaking into a new episode! Mikoto has clones called Sisters!?
"Clones of the Railgun live in the city." Mikoto has heard of such urban legends. However, she begins examining the truth behind it despite believing it all to be a hoax. Then one day Mikoto meets one of these Sister clones, and discovers the cruel truth hidden from her...!
- Chapter 18: August 10, Part 1
- Chapter 19: August 10, Part 2
- Chapter 20: August 11
- Chapter 21: August 15, Part 1
- Chapter 22: August 15, Part 2
- Chapter 23: August 15, Part 3
|魔法禁書目錄外傳 科學超電磁砲 集數 4|
|Date of Release||May 5, 2010|
美琴雖然覺得只是八卦消息，還是決定去一探究竟調查真相。 而在某天，美琴終於和自己的複製人「妹妹們」其中之一相遇， 卻也揭開了隱藏的殘酷事實…！
|A Certain Scientific Railgun Manga Volume 04|
|Date of Release||May 8, 2012|
|Number of Pages||192 pages|
| Throughout Academy City, the rumors are spreading like wildfire. People are finding mysterious envelopes containing free cash cards in and around the back alleys of the Seventh School District. Whipped up into a frenzy, the populace looks for as many cash cards as they can get their hands on, even if it means braving the perilous Skill-Out Territory, risking injury or worse by roving gangs of Level 0 thugs. Judgement is left with no choice but to step in…
While Shirai and Uiharu try to crack the case and figure out who is behind the cash card chaos, Misaka decides to take to the streets herself… and soon gets embroiled in a disturbing scientific conspiracy the likes of which will rock her world to the core.