In an alternate history, following World War II, civil unrest and terrorism run rampant in a devastated Japan under foreign occupation. During a botched interception of underground munitions being transferred by a terrorist organization, Constable Kazuki Fuse, a soldier in an elite counter-terrorism unit, witnesses the true terror of human nature. He fails to prevent a teenage girl from carrying out a desperate suicide bombing that subsequently causes immense destruction to Tokyo. With mental scars and his competence under question, Fuse is sent back to the military academy for re-evaluation. Unbeknownst to him, he will soon be caught up in a web of government conspiracies that have the power to determine the future of all of Japan. As Fuse treads the fine line between human and beast, he ultimately discovers to which side he truly belongs.

Idol-obsessed Kousaku Hata is left devastated when his favorite, Yuka Kusakabe, unexpectedly announces her retirement at the peak of an illustrious career. As Yuka’s biggest fan, this news proves to be more difficult than he can bear. Shaken to his very core, he sinks into depression and places himself in self-imposed isolation. However, on the day his friends managed to convince him to attend school again, he gets a pleasant surprise. It turns out that his beloved idol, under the guise of Ringo Kinoshita, has transferred into his class. This miraculous development fills Kousaku with newfound resolve, as he dedicates himself to take advantage of the once-in-a-lifetime opportunity. With the support of his teacher and friends, Kousaku works toward getting close to the girl of his dreams and uncovering the reason for her retirement from the entertainment industry.

The 150-year-long stalemate between the two interstellar superpowers, the Galactic Empire and the Free Planets Alliance, comes to an end when a new generation of leaders arises: the idealistic military genius Reinhard von Lohengramm, and the FPA's reserved historian, Yang Wenli. While Reinhard climbs the ranks of the Empire with the aid of his childhood friend, Siegfried Kircheis, he must fight not only the war, but also the remnants of the crumbling Goldenbaum Dynasty in order to free his sister from the Kaiser and unify humanity under one genuine ruler. Meanwhile, on the other side of the galaxy, Yang—a strong supporter of democratic ideals—has to stand firm in his beliefs, despite the struggles of the FPA, and show his pupil, Julian Mintz, that autocracy is not the solution. As ideologies clash amidst the war's many casualties, the two strategic masterminds must ask themselves what the real reason behind their battle is.

Stride—an extreme sport that combines parkour, free running, relay, and sprinting—is what made first year high school student Nana Sakurai enroll in Honan Academy, after being captivated by the school's stride team. Sharing the mutual intention of joining the team is fellow first year and stride maniac, Takeru Fujiwara, and together they request to join. Much to their dismay, however, the stride club is no longer active due to lack of members, and they are now operating under the shogi club. In order to revive the stride club, Nana and Takeru recruit first year Riku Yagami—a fast runner who is interested in almost every sport. With this new team, the club now aims high at a new goal: to win the prestigious End of Summer competition, and bring the Honan stride team back to their prime.