Kenjaku, the one known as Noritoshi Kamo and most recently as Suguru Getou, has initiated the next step in his destructive, thousand-year plan of ordinary humans' evolution and eventual eradication. The jujutsu world higher-ups reinstate 15-year-old Yuuji Itadori's execution, as Satoru Gojou is incapacitated as a result of Kenjaku's master plan in Shibuya. While Yuuji is unaware of this, he patrols the abandoned Tokyo streets with Chousou, exterminating any and all cursed spirits in his way. Meanwhile, the bigoted and arrogant Naoya Zenin's pride takes a hit when Megumi Fushiguro is selected as the Zenin Clan's next head. To draw out Megumi and eliminate him, he goes after Yuuji—but Yuuta Okkotsu is set on being Yuuji's executioner. Kenjaku's Culling Game—a rigorous battle royale spanning throughout Japan and forcing the jujutsu competitors to kill each other—is set in motion, and the young jujutsu sorcerers join the fray to settle old scores, free Gojou, and liberate the jujutsu world from the threat that is Kenjaku.

It is a normal day; everyone from deranged military girl Tanya Degurechaff and 16-year-old isekai protagonist Satou Kazuma to expansionist overlord Ainz Ooal Gown and demon sisters Rem and Ram go on with their daily lives. Suddenly, a conspicuous red button begging to be pressed appears before them. Overcome by curiosity, the otherworldly characters push the button, sending them to an unfamiliar world. With no way of escaping, the characters must lead a normal school life and make acquaintances with the others. One thing is certain: the classroom full of fan-favorite eccentric personalities never gets boring!

Full of wonder and excitement, the Noah's Arc Circus troupe has captured audiences with their dazzling performances. Yet these fantastic acts do not come without a price. Children have mysteriously gone missing around London, correlating to that of the group's movements. Unsettled by these kidnappings, Queen Victoria sends in her notorious guard dog, Ciel Phantomhive; and his ever-faithful demon butler, Sebastian Michaelis, on an undercover mission to find these missing children. Trying to balance their new circus acts with their covert investigation under the big top, however, proves to be quite a challenge. With the other performers growing suspicious and the threat of the circus' mysterious benefactor looming overhead, what the two discover will shake Ciel to his very core.

Magano, a parallel realm filled with monsters known as Kegare, is a place where exorcists deal with all impurities. Benio Adashino is a prodigy exorcist who is recognized for her strength and is summoned to Tokyo by the Exorcist Union. On her way, she plummets into the arms of Rokuro Enmadou, a young exorcist with a troubled past. But the impurities of Magano do not rest. When these two exorcists witness a couple of children stolen by a Kegare, Benio rushes to save them, dragging Rokuro along with her into Magano. Engaged in a fight she is on the verge of being defeated in, Benio is saved by Rokuro, revealing himself capable of being her rival in talent. Sousei no Onmyouji tells the story of two talented exorcists who are destined to become the Twin Star Exorcists and the prophesised parents of the Miko—the reincarnation of Abe no Seimei—who will cleanse the world of all impurities.