Thirteen girls, each with the ability to materialize "Elements" and summon metallic guardians called "Childs" have been brought to Fuuka Academy to battle mysterious creatures called Orphans. Each with a different personality and background, they must decide who they truly care about and why they fight.

There isn't a single person in Sakuradamon High who hasn't heard the legends about Seiji "The Mad Dog" Sawamura's demonically powerful right hand. His reputation makes it fairly difficult for him to approach girls, and after being rejected 20 times straight, he half-jokingly vows to finish high school with his right hand for a girlfriend. Much to his surprise, after waking up the next morning, Seiji discovers that his demon right hand has mysteriously turned into a miniature girl, Midori Kasugano, who reveals that she has had a crush on Seiji for the past three years. Because their situation is not ideal for either of them, Seiji attempts to return Midori to normal. But after causing a big misunderstanding at the Kasugano household, the pair decide to keep their predicament between them until a solution is found. Thus begins an odd relationship, and what could be the only chance for Midori to finally be with the one she loves. [Written by MAL Rewrite]

Miho Shinohara is a care-free third-grader and an aspiring manga artist. One day, she encounters Mogu and Pigu - two lost fairies disguised as stuffed animals. In exchange for staying at her home until they find a way to return to their own world, the fairies give Miho a special sketch pad and pencil that enable her to magically create real objects from what she draws. With the pen, Miho can also transform into Lala, a beautiful teenage girl created from her manga art. As Lala, she is discovered by a talent agency, and so begins her adventures from an ordinary school girl to a model to an idol singer. (Source: ANN)

One sunny day invaders came from space. They weren't little green men or funny girls wearing school uniforms, though. They were ugly robots which defeated the UN forces in seconds. After that the invaders (known as "eyeballs") roamed around and observed human society. In fact, they were peaceful unless attacked. They were polite and followed all the traffic laws, too. Still, they were aliens and the people of Earth wanted them to go home. The Kitanohashi High School Magic Club took it on themselves to defeat these foul robots and free the world. (Source: ANN)