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Attack on Titan (literally translated as "Advancing Giants") is a Japanese manga series, and now an anime, originally written and illustrated by Hajime Isayama. The story centers around the lives of Eren Yeager, his adoptive sister Mikasa Ackerman, and their friend Armin Arlert, who live in a world where the remnants of the human population live inside cities surrounded by enormous walls due to the sudden appearance of the Titans, gigantic humanoid creatures who devour humans seemingly without reason. Their lives are changed forever after the appearance of a colossal Titan brings about the destruction of their home town and the death of Eren's mother, spurring them to enter the army to battle the Titans themselves.

Hinata began playing volleyball after seeing the "small giants" who played the sport when he was in elementary school. He suffers a crushing defeat in his first and last tournament in middle school at the hands of his rival Tobio Kageyama. So, Hinata joins Kurasuno High School's volleyball team, vowing revenge against Kageyama. However, Kageyama is also on Kurasuno's team. The former rivals form a legendary combo with Hinata's mobility and Kageyama's precision ball-handling. Together, they take on the local tournaments and vow to meet Kurasuno's fated rival school in the nationals.

Chihiro and her family are on their way to their new house in the suburbs when her father decides to take a shortcut along a lonely-looking dirt road. After getting out of the car and walking along a path for a while, they discover an open-air restaurant filled with food but with no workers or customers present. Mom and Dad don't hesitate to sit down and dig in, but Chihiro senses danger and refuses. As night falls, she is terrified to see the area fill with faceless spirits, but when she runs to find her parents, she discovers that they have been turned into pigs. She is found by a mysterious boy named Haku, who promises to help her. He gets her a job working in a nearby building, which turns out to be a bathhouse for the thousands of Japan's gods and spirits. Though the work is hard and the people strange, she does as well as she can. Her parents, however, are still waiting in the hotel's stockyard, and Chihiro must find a way to break the spell on them before they end up as the main course of some guest's dinner.

Sotobamura is a small village with around 1300 residents; so small the village isn't even connected to a single highway. An isolated village in which old customs, such as the burial of the dead, are still practiced. One day, the bodies of three people are found dead. Although Ozaki Toshio, the village's lone doctor, feels uncertain, he treats the deaths as a normal occurrence. However, in the days following, the villagers start to die one after the other. Is this mere coincidence, an epidemic, or something else entirely...

The second season of Toaru Majutsu no Index.