As time has gone by, Touma has accumulated numerous, powerful allies from both the Scientific and Magical Worlds. Fearing this "Kamijo Faction" could upset the balance of power between the two sides of the Science/Magic conflict, a magician using Aztec powers to wear the skins of others is sent to infiltrate the newborn faction and take it down from the inside.
Meanwhile, Misaka has problems with a stalker and recruits Touma to play the part of her boyfriend.