Advanced placement into a school of higher grade proof-reading is determined by the results of the Promotion Test strictly for class type. Ranging from A class with the best facilities anyone can offer all the way down to F Class which is composed of low dining tables, rotten tatami mats and other worn out facilities. Students can change classes by competing using the Examination Summons Battle system or ESB. Students summon characters with their equivalent test mark scores and use them to compete with other classes.
Akihisa Yoshii, now in his third year in high school, continues his misadventures with Yūji, Mizuki, and other high school friends. Akihisa, however, is enrolled in a rather unique high school. In Fumizuki Academy, all of the students are given avatars with fighting abilities whose power reflects the student's academic success. With their avatars by their side, our characters explore deeper into what it means to be a friend and how they treat each other and why. While Shoko, the school's #1 student, endlessly tries to woo Yūji, Minami and Mizuki try to capture the romantic attention of the oblivious Akihisa.
In Victorian-era London, on the night of Ciel Phantomhive's tenth birthday a fire destroyed his manor and killed both of his parents. In a moment of death Ceil strikes a deal with a demon, his soul in exchange for revenge. This demon becomes his butler and calls himself by name of Sebastian Michaelis, to protect and serve Ciel until the deal has been completed. One month after the fire Ciel returns from being missing, with his new butler Sebastian. Ceil is now the head of the Phantomhive corporation, handling all business affairs as well as the work as the Queen of England’s guard dog and looking for his parents murders.
Yūki Ōjima attends Takafuji Private Academy, a large school with over 6,000 students, where he is a member of the Food Research Club along with seven others, including his childhood friend Chisato Sumiyoshi. The members leisurely spend their time in the club doing very little. When the election for the next student council president comes up, the front runner Satsuki Shinonome proposes that clubs which have no merit should be sorted out and abolished. The Food Research Club seeks advice from the current student council president, Yakumo Mōri, who suggests that Yūki run in the election as an opposing candidate. Yūki learns about the issues facing the school and decides to run in the election.
Shinichi Kanou is a young secluded Otaku who is offered a job thanks to his vast knowledge of anime, video games and manga and just after meeting his new employer, he is kidnapped, awakening in an alternate world with a fantasy setup. Shinichi then is informed that he was in fact selected by the Japanese government to help improve his country's relations with this new world by establishing a company to spread the unique products of the Japanese culture to this new, unexplored market.
Oz Vessalius, heir to one of the duke houses, has just turned fifteen. His life is rich and carefree, darkened only by the constant absence of his father. At his coming-of-age ceremony, however, everything changes. For no reason that he can discern, he's cast into the prison known as the "Abyss", only to be saved by a "chain" known as Alice, the bloodstained black rabbit. It is unknown why was he cast into Abyss, how does Alice factor into it all, and what does the organization known as "Pandora" want with him.