Tsubasa Shiina is a 10-year-old girl who recently moved to Hokkaido to live with her father. In school, she is very quiet and unsociable with her classmates. Then one night, she witnesses a UFO crash in the forest near her home. She rushes to the scene and finds the pilot, codenamed "D.D.", in a barely stable condition. Also in the scene is a Maguar, a hideous alien that hatched aboard D.D.'s ship. As the Maguar is close to taking Tsubasa's life, an alien lifeform fuses with her body to form the Riberus battle armor Figure 17, which shortly destroys the alien threat. The life form takes the name Hikaru and turns into an identical twin of Tsubasa. As time passes, Tsubasa becomes more open to everyone around her, thanks to her new twin sister Hikaru. However, with Maguar eggs scattered all over Hokkaido, their ability to form Figure 17 is needed to eliminate all hatched Maguars until backup from D.D.'s home planet arrives on Earth.

In the near future, humans have discovered a fourth dimension, Dimension W, and a supposedly infinite source of energy within. In order to harness this profound new energy, mankind develops advanced "coils," devices that link to and use the power of Dimension W. However, by year 2071, the New Tesla Energy corporation has monopolized the energy industry with coils, soon leading to the illegal distribution of unofficial coils that begin flooding the markets. Kyouma Mabuchi is an ex-soldier who is wary of all coil-based technology to the extent that he still drives a gas-powered car. Kyouma is a "Collector," individuals with the sole duty of hunting down illegal coils in exchange for money. What started out as just any other mission is turned on its head when he bumps in Mira Yurizaki, an android with a connection to the "father" of coils. When a series of strange events begin to take place, these two unlikely allies band together to uncover the mysteries of Dimension W. [Written by MAL Rewrite]

Kakeru and Suguru are brothers who both have a flaming passion for soccer. However, while Suguru becomes a rising star in the Japanese youth soccer system, Kakeru decides to take on a managerial role after struggling on the field. But due to a cruel twist of fate, Kakeru ends up reevaluating the role he has chosen. In hopes of one day being able to enter the World Cup by becoming a member of the national team, Kakeru trains harder than anyone else. He isn’t alone in this quest for glory, though. Kakeru's childhood friend, Nana, is a soccer prodigy of her own, with the wicked nickname “Little Witch”. She is a top-ranked player and is already playing for Nadeshiko Japan, the Japanese women’s national team. Nana's success gives Kakeru the extra push he needs to reach for his goals. Soccer and adolescent fervor combine for an epic, emotional ride. Check it out for yourself in Area no Kishi!

Short extras of the anime included in each of the six Blu-ray volumes of Amagami SS+.