Equipped with cutting-edge weaponry and specialized troops, a private military organization named Mithril strives to extinguish the world's terrorism and all threats to peace on earth. The organization is powered by the "Whispered," individuals who possess intuitive knowledge and the remarkable ability to create powerful devices and machinery. Seventeen-year-old Sousuke Sagara, a sergeant working for Mithril, has been assigned to protect Kaname Chidori, a Whispered candidate. He is ordered to join her high school class and be as close to her as possible to prevent her from falling into enemy hands—that is, if he can safely blend in with their fellow classmates without revealing his true identity. Sousuke, who was raised on a battlefield and has very little knowledge of an average high school student's lifestyle, must adapt to a normal school life to safeguard Kaname. However, enemy forces have already begun making their move, and Sousuke is about to find out that the adversary coming for the Whispered girl may be a lot more familiar than he expects. [Written by MAL Rewrite]

The Neighbor's Club—a club founded for the purpose of making friends, where misfortunate boys and girls with few friends live out their regrettable lives. Although Yozora Mikazuki faced a certain incident at the end of summer, the daily life of the Neighbor's Club goes on as usual. A strange nun, members of the student council and other new faces make an appearance, causing Kodaka Hasegawa's life to grow even busier. While they all enjoy going to the amusement park, playing games, celebrating birthdays, and challenging the "school festival"—a symbol of the school life normal people live—the relations amongst the members slowly begins to change... Let the next stage begin, on this unfortunate coming-of-age love comedy!! (Source: ANN)

Hailing from America, Jabberwock—a street basketball team with skills comparable to those of the NBA—has come to Japan to play an exhibition match against Strky, a team of former third-year students who once played in the Interhigh and Winter Cup. However, due to the vast difference in skill, Jabberwock easily wins. Their captain, Nash Gold Jr., mocks the basketball style of all players in Japan by comparing them to monkeys.

Infuriated by the nasty comment, Kagetora Aida challenges them to a revenge match. Because of pride and the belief that the results will be no different, Nash accepts the challenge. Kagetora then assembles Vorpal Swords, a team composed of the Generation of Miracles, including Kuroko Tetsuya and Kagami Taiga, for they are the only ones who stand a chance against a foe that seems unbeatable from every angle.

Yuusei Fudou is out to get back what was stolen from him. The world of dueling has evolved, with Riding Duels becoming the peak of entertainment for the residents of Neo Domino City. They are played on D-Wheels, a hybrid between Duel Disks and motorbikes. After the mechanically skilled Yuusei managed to build his own D-Wheel, his former friend Jack Atlas stole it alongside Yuusei's best card, Stardust Dragon; ditching their decrepit hometown of Satellite, he escaped to Neo Domino City. In the two years since then, Jack has risen to the top of the dueling world, while Yuusei has been making preparations thanks to the help of his friends. With his new D-Wheel finished, he now sets off to Neo Domino City, his only goal to find Jack. Unbeknownst to either of them, there are far bigger things at stake than they can imagine, with puppeteers pulling the strings behind the scenes. [Written by MAL Rewrite]