A Certain Scientific Railgun volume 13 features story by Kazuma Kamachi and art by Motoi Fuyukawa.

Kuriba Ryoko’s Doppelgänger–the by product of a cyborg experiment that may have generated a human soul–has run amok, and Misaka may be the only one who can stop it. Misaka’s unlikely team-up with the girls of Scavenger could be the key to uncovering the truth inside the Doppelgänger. The explosive conclusion to the Dream Ranker Arc!