In the near future when technology has significantly advanced, a famous AI TV fortune teller seemingly foresees high school student Asahi Kashiwagi's day with pinpoint accuracy. On his way to school, he encounters Aoi Izumisawa, Bai Mongfa, Karin Istel, Amelia Irving, and Ilya Ilyukhin. Despite meeting them for the first time, Asahi suddenly receives love confessions from all of them at the end of the same day, perfectly aligning with the fortune teller's prediction. As if that was not enough, Asahi soon learns that these five individuals are actually candidates to become his bride, and they have been invited by his father to live at Asahi's home. Left with no other choice, he reluctantly allows them to stay, resulting in a bawdy turn of events that brightens up his average high school life. However, as Asahi spends more time with them, forgotten memories gradually resurface. While uncovering the hidden truth, Asahi begins to believe that his fate with these potential partners might be more than just mere coincidence.

After foiling a world-threatening plot, Shigeo "Mob" Kageyama returns to tackle the more exhausting aspects of his mundane life—starting with filling out his school's nerve-racking career form. Meanwhile, he continues to assist his mentor Arataka Reigen and the office's new recruit, Katsuya Serizawa, in solving paranormal cases of their clients. While continuing his duties, Mob also works on gaining more independence in his esper and human lives, as well as trying to integrate better with the people around him. However, new supernatural and ordinary challenges test Mob’s emotional stability and force him to confront the realities around him. As he strives to continue forward on the path to maturity, Mob must resolve his emotional crises and reassess the naivety he has held on for so long.

On Halloween night, a young chimney sweep named Lubicchi befriends a man magically conjured out of garbage. Giving him the name Poupelle, Lubicchi is able to recreate a bond he lost when his father died to the tyranny of the Inquisitors—an oppressive force that aims to suppress outside knowledge and the town's true history. But their newfound relationship soon captures a lot of attention, and the threat of the Inquisitors and even the criticism of a few townspeople will test the duo's friendship. In spite of this, Poupelle has struck a particular chord with Lubicchi, and the two conspire to bring the truth to the surface and clear the chimney smoke that clouds the town's skies.

Everyone handles rejection in their own way. But when Takashi turns down Fumiko's confession, the young schoolgirl unleashes her frustrations on a fanatical sprint through the neighborhood. However, a single misstep sends her soaring, and things go downhill from there...