Tom Sawyer is a young boy growing up along the Mississippi River in the mid 1800s. Along with his best friend Huckleberry Finn, he spends his days ditching school, fishing, climbing trees and having adventures.

Academy City stands at the forefront of scientific and technological progress, best known for their development of espers: those capable of wielding superhuman abilities that alter the rules of reality. The most powerful among them are the Level 5s, and the one known as Accelerator reigns supreme, even after being weakened by a severe brain injury. By his side is the young girl known as Last Order, whom despite his cold demeanor, he holds closely and vows to protect at all costs. Though Accelerator may be recovering from his injury, the dark side of Academy City never rests, and so he finds himself unwillingly caught up in the midst of a new conflict. When a mysterious young woman approaches Accelerator in pursuit of Last Order, the highest-ranked esper is confronted by a venomous organization that has taken root in Anti-Skill, Academy City's peacekeeping organization. With dangerous forces on the move that threaten to put Last Order and her sisters at risk, the self-proclaimed villain prepares to step into the darkness once again. [Written by MAL Rewrite]

Uzuki Shimamura is an aspiring student who dreams of being an idol. After failing her first audition, a producer from 346 Productions tells Uzuki that she has been chosen for the "Cinderella Project," a new idol group. The project, however, still lacks two other members, so the producer needs to scout suitable candidates. The producer's eyes fall upon Rin Shibuya, who is in the midst of an incident with an upset crowd. As the imposing producer defends her, the two of them are taken in for interrogation by the police, and released after some explanation. Taking this opportunity, he scouts Rin for the Cinderella Project, only to be rejected. Will the producer be able to find two more members for his idol group? [Written by MAL Rewrite]

A "healing story" OVA from director Satou Junichi, the director of Aria and Umi Monogatari. The story takes place in Seto Inland Sea and is about a girl who likes taking pictures.