A Certain Scientific Railgun manga volume 17 features story by Kazuma Kamachi and art by Motoi Fuyukawa.

A fight breaks out among Tokiwadai Middle School’s three biggest cliques! At first, Mikoto has no interest in the drama, but after meeting with the leaders of each (and running into free-spirited Ruri, who isn’t affiliated with any clique, yet has the interest of all three), she suddenly finds her school life taking a turn!