Nagomu Irino returns to his Kyoto home for the first time in ten years when his father is hospitalized. Nagomu is eager to take over Ryokushou, the family's Japanese sweet shop, but he's instead asked to be a father figure to Itsuka Yukihira, the girl everyone calls the successor.

Oosawa Maria is a Japanese photographer currently working in Shanghai, China. Along with her partner Mino, she searches for potential newsworthy stories throughout the city. When strange events occur at a local festival, Maria and Mino immediately investigate. Quickly, the two are immersed in a battle between unknown masked men and a strange, white-haired woman. Just when Maria is about to be caught in the crossfire, an old friend by the name of Canaan appears and helps Maria escape. But a sinister plot over a deadly virus soon develops, and Canaan learns she must confront her past if she wants any chance at stopping the perpetrator and saving her friends. [Written by MAL Rewrite]

The story takes place shortly before Cartaphilus took a nap and Chise became an auditor at the academy. Elias and his friends help Chise prepare for the academy, where in the middle of everyday life, Spriggan visits the mansion on a spooky horse with the words, "The appearance of the ghost hunting association is unusual this time." Gabriel, an ordinary boy who just moved from London, was bored of his environment of parting with friends, being in an unfamiliar location, and everything else. Sitting by the window and glancing beyond, he spotted a purple smoke and decided to chase after it, looking to escape his boredom. Though it should not, the world of the boy begins to converge with the wizards, who live on the other side behind a thick veil.

Since childhood, Aoba Suzukaze has loved the Fairies Story game series, particularly the character designs. So when she graduates from high school, it is no surprise that she applies to work at Eagle Jump, the company responsible for making her favorite video game. On her first day, she is excited to learn that she will be working on a new installment to the series: Fairies Story 3—and even more so under Kou Yagami, the lead character designer. In their department are people who share the same passion for games. There is Yun Iijima, whose specialty is designing monsters; the shy Hifumi Takimoto, who prefers to communicate through instant messaging; Hajime Shinoda, an animation team member with an impressive figurine collection; Rin Tooyama, the orderly art director; Shizuku Hazuki, the game director who brings her cat to work; and Umiko Ahagon, the short-tempered head programmer. New Game! follows Aoba and the others on their adventure through the ups and downs of game making, from making the perfect character design to fixing all the errors that will inevitably accumulate in the process. [Written by MAL Rewrite]