After being captured for attempting to assassinate the leader of Kumogakure, the Raikage, and killing Jounin from Kirigakure and Iwagakure, Naruto is imprisoned in Houzukijou, a criminal containment facility also known as the Blood Prison. 

The master of the castle, Mui, uses the ultimate imprisonment jutsu to steal power from the prisoners. In this place, something is aiming for Naruto's life. The battle to prove his innocence and uncover the truth has begun for Naruto and his friends.

(Source: AnimeAvenue)

After the defeat of Myouri Unzen at the hands of Medaka Kurokami and her Student Council, peace has returned to Hakoniwa Academy—at least, for a short while. Soon, Medaka, Zenkichi Hitoyoshi, Kouki Akune, and Mogana Kikaijima find themselves wrapped up in another sinister scheme, known as the "Flask Plan," led by the school's principal himself. However, the council's first problem is to deal with a whole new group of superhuman students calling themselves the "Thirteen Party," led by the egotistical but powerful Oudo Miyakonojou. With the mysterious Flask Plan, Oudo's tyranny, and the resurfacing of an old enemy, the state of Hakoniwa Academy is far from tranquil, and Medaka and her companions have their hands full as things only get a lot more abnormal. [Written by MAL Rewrite]

Life has returned to some form of normalcy after the end of the series, and so His Majesty Yuuri Shibuya travels to oversee how things are going. While doing so, he runs into the king of Small Shimeron--Sararegi. But it seems there may be something more to him than the friendly king he presents himself as. Yuuri go back to Shimaron to relax and meet some friends, when the "king" of Little Shimaron suddenly joins the group and wants the Maou to come to his country. The Original king sends a message to Yuuri's brother and his friend that Yuuri is in trouble. (Source: ANN)

The anime's story is set in 2027, one year after the end of the fourth non-nuclear war. New Port City is still reeling from the war's aftermath when it suffers a bombing caused by a self-propelled mine. Then, a military member implicated in arms-dealing bribes is gunned down. During the investigation, Public Security Section's Daisuke Aramaki encounters Motoko Kusanagi, the cyborg wizard-level hacker assigned to the military's 501st Secret Unit. Batou, a man with the "eye that does not sleep," suspects that Kusanagi is the one behind the bombing. The Niihama Prefectural Police detective Togusa is pursuing his own dual cases of the shooting death and a prostitute's murder. Motoko herself is being watched by the 501st Secret Unit's head Kurutsu and cyborg agents. (Source: ANN)