Toaru Majutsu no Index SP contains several short story arcs not covered from Index and Railgun's main stories, and adds more insights into the Toaru universe. The 4 stories focus on Stiyl Magnus, Mark Space, Kamijou Touma, and Uiharu Kazari respectively.
Toaru Kagaku no Railgun: Arts and Sciences City SS is a short story in Arts and Sciences City that takes place in the time period between September 3rd to 10th. Academy City has a exchange program with the rest of the world that allows some students to travel for this week to other places, and some students are allowed into Academy City during this time. Mikoto, Kuroko, Saten and Uiharu went to the Arts and Sciences City, made on a artificial island off the coast of California for a field trip. The Arts and Sciences City is known as a city that has cutting edge technology (in terms of the standards of the 'Outside' of Academy City - ie it is still far behind that of Academy City's), and is trying to take over Hollywood as the entertainment capital of the world. Stuntsmen and shows occur frequently at this city, and anything out of the ordinary is treated as another show. Due to the climate apart from sleeping everyone wears their swimsuits all the time. (Source: Toaru Majutsu no Index Wiki)
A jungle and war victims: these fragments constitute You Mizunashi's leftover memories. A doctor's son, You questions whether these pieces of his "past" aren't just constructs of a delusional mind. He forces himself to remember and in seeking his personal truth, alienates himself from his peers and presents school bullies with an easy target. One day, while he is being harassed, a mysterious man—with a gaping wound on his abdomen—appears before You and his tormentors. You hastens to help the stranger and in return, learns that his unexpected patient goes simply by the name "R" and that R trades in secrets.
Ootsuki, the foreman of the underground debt-slave labor camp, is finally using his one-day vacation above ground. The blacksuits of the Teiai Corporation follow him to make sure he doesn't escape, but are constantly baffled by the completely mundane ways he decides to use his time.
Six years ago, following a crushing defeat, a group of friends promised that they will one day take their friend Suzuo to the Koshien. Now in their first year of high school, the friends have reunited behind the pitcher Kitaro Kitaoji to keep their promise. With Suzuo as their manager and Kitaro's signature left-handed, underhand "Submarine Pitch," they may just go all the way.
This is the story of five students who make up a crazy and unique group (the gang of the funny faces) and, in an incredible twist of luck, they befriend the cutest girl in school. Of course, they will enter into competition with many groups in their school, where teachers are tricky and sometimes clueless, where they can still defy the laws of nature to win sports tournaments and where you can still be childish, Anything could happen in this high school. (Source: Anime News Network)
*3-nen Kimengumi* is an episodic chronicle of the bizarre adventures of a group of misfit junior high school boys who form a club known as the "Kimengumi." (Source: Wikipedia)
Taku Maezawa, an engineering student, and Hisashi Iguma, a robotics specialist, create the concept of "demokratia": 3000 people randomly recruited on the web who will decide by vote the actions and behavior of the android Mai.
A tribute anthology of Mushishi.
Eiji is a high school student who lives with his unsuccessful novelist father. He's a shy, poor otaku, but he's a thoughtful boy who never forgets what his late mother taught him about the importance of compassion for others. What Eiji also admires is Aoi, the daughter of the president of a large company. However, Eiji couldn't even bear to look at her, given the huge disparity between them. One day, after school, Aoi greets Eiji when he returns home. Eiji is surprised when Aoi says something astonishing... (Source: Kadokawa, translated)
i-Mentor correctly lights the way 24 hours a day, 365 days a year. Let's leave all life decisions to the "living pilot"— In the near future, tablets called "i-Mentor" give accurate advice to people based on the latest genetic information. Will future dreams come true, is this person the best marriage partner? When will I die? All i-Mentors are based around numbers, and they teach you the "correct way of life." Is human happiness really determined only by "genes"? In a "Utopia" managed by i-Mentor, everything is guided by data and numbers, and the dignity of human beings is tested. (Source: Official Publisher, translated)
The biography of German World War II commander Erwin Rommel and the story of his Afrika Korps.

