In the aftermath of the incident involving Oriana's Shorthand, Fukiyose Seiri recovers in a hospital room. Deep inside, she feels bitter upon the thought of ruining everyone's fun in the Daihasei Festival because of her condition, which she has been thinking was just a heat stroke. Soon, she is accompanied by a certain frog-faced doctor, who assures her that he will be able to help her.
Meanwhile, Stiyl impatiently waits at the bus terminal with an All-Around Reality Circle prepared. He soon receives a call from Tsuchimikado Motoharu reporting Touma's destruction of Oriana's Shorthand and asking him to perform the All-Around Reality Circle spell once again. Motoharu also reports to him about the incident that ended with Touma destroying the Shorthand and the only casualty.
With the call ended by Stiyl he prepares for the spell, and traces Oriana's location: Futsuka Station in District 7.
Touma and Motoharu rush to pursue Oriana once again, and with Stiyl's help, they track down Oriana's movements. Oriana takes them to different locations, trying to wear them down, and makes her escape by boarding one of the buses roaming around Academy City. They failed to make it in time, but upon Touma's confirmation that no one else is aboard the bus, Motoharu contacts Stiyl and the rune magician activates one of his runes at the bus. It turns out that Stiyl prepares runes on all the buses they found at the terminal earlier.
The explosion brought by the rune tips the bus to one side and turns it into an inferno. However, Oriana makes it out in one piece, using a water spell to douse the flames. Touma confronts her about Seiri's involvement, and Oriana reveals that she expects it to happen; according to her, everyone is involved, and it would be easy for one to be dragged into the conflict.
With the intent to finish off Touma, Oriana unleashes her Shorthand, but it only affected Motoharu. Oriana tells him that the spell uses blue letters (attributed to water) to cancel the effects of regeneration (attributed to fire). Touma tries to cancel the spell, but he finds out that it is a sustained spell. Oriana then advises Touma to get to her quickly so that he can save Motoharu.
Touma rushes to Oriana while she prepares an ice wall to act as a diversion. Touma breaks through the ice, but faces a vortex of wind coming straight at him. Although slightly wounded by the vortex, he manages to dispel it; Oriana, though has another spell prepared for him: a sword made out of shadows. Oriana throws this to Touma, and watches as it explodes, throwing Touma off-balance. Oriana continues on her relentless streak of hitting Touma on the chin and in the stomach with the spells on her hand, and confidently comments on Touma's inability to stand up after her attacks.
However, Touma proves her comment wrong.
Oriana threatens Touma with Blade Crater, a spell which "would kill him if he moves", but this did not move Touma; instead, he keeps on stepping on the spell area. Oriana is forced to activate the spell prematurely, but Touma rushes to her in response, breaking through every defense she makes, and lands a punch in her face. The hit throws Oriana back, making her lose grasp of the package she was holding.
Oriana soon stands, even teasing Touma with her breasts, and escapes, leaving Touma with her package. She then assures him that her spell would wear off after 20 minutes.
As Motoharu recovers, Touma takes the time to examine the package Oriana is holding. He is shocked to find out that it does not contain Stab Sword; instead, an ice cream shop sign is the thing Oriana has been carrying all along.
Meanwhile, Oriana undresses elsewhere as she talks to someone using a spell card, who is clearly worried about what happened to her. Oriana guarantees that everything is fine, despite the fact that someone else has already gotten the billboard.
On the other side of the world, Laura Stuart receives a shocking development from Charles Conder, the curator of the British Museum: the weapon called as Stab Sword does not exist. Charles explains that the tale behind Stab Sword is a tale that spiraled out of control and that the true identity of the sword is the Cross of St. Peter (Italian: Croce di Pietro), the cross used to crucify one of the Twelve Apostles.
Laura is alarmed by the new information; she realizes that when the trade is fulfilled, Academy City will cease to exist.
Laura relayed the information to Stiyl, who then hands out the information to Touma and Motoharu. Although Touma has no idea what happens when Academy City is put into the dominion of the Roman Catholic Church, Stiyl explains that it will tip the balance between science and magic to the favor of the Church, a fate worse than mere destruction.
Later, Touma ponders on what Stiyl says, while he is seen by Index at the park. Index is ignored by Touma at first, but she manages to get his attention. Touma is shocked that Index is wearing a cheerleader's outfit, and his reaction caused a misunderstanding that earned him a punch on his head.
Index is actually concerned about Touma and wants to cheer him up, but Touma exposes that he thought that she is angry because she is hungry. That infuriated Index and she hits him hard on his head.
Meanwhile, Touma's parents Shiina and Touya meet Misaka Misuzu once again; this time, she is accompanied by her daughter Mikoto. Misuzu wants to introduce Mikoto to the "family of the one she likes", much to Mikoto's shock, and invites them to lunch together. Soon, a certain scantily-clothed blonde lady bumps into Touya, and after the lady leaves an apology, Touya has to apologize to Shiina for fixing his eyes too much on the lady.
Soon, the Misakas and the Kamijous meet up at a nearby restaurant; Touma and Index also arrive as well. Mikoto displays an outburst for not being able to find Touma anywhere, and even drags Index into the discussion. Touya soon exposes that Index has accompanied Touma in a beach one time, much to Mikoto's shock. Index soon becomes curious about Mikoto, asking her if she is Touma's girlfriend, and before a commotion could start, Misuzu invites everyone for lunch to start.
Touma soon wonders if Misuzu is Mikoto's sister; Misuzu introduces herself as Mikoto's mother, which shocks both Index and Touma.
Rating: 8/10