When a genius patissier dies in a tragic accident before achieving his dream of creating the world's greatest sweets, he is reincarnated as nine-year-old Pastry Mille "Pas" Morteln. Now in a medieval world brimming with swords and magic, Pas enjoys a peaceful life in the Fief of Morteln under the authority of his father, the military hero Lord Casserole. However, scarce ingredients render sweets a luxury, so Pas can only dream of baking. Once news arrives of approaching bandits, Pas must learn magic and fight to defend his land, all to one day create a confectionery paradise!

Megumin is a young and passionate wizard from the Crimson Demon Village, a remote community of mages with red eyes and a flair for the dramatic. She has devoted her life to mastering explosion magic, a powerful but impractical spell that leaves her drained of mana and unable to move for the rest of the day. Regardless, she refuses to learn any other skills. Along with her childhood friend and self-proclaimed rival, Yunyun, Megumin enrolls in the Red Prison: a prestigious academy for Crimson Demon magic users. There, she learns more about the secrets and history of her clan, as well as the threats and challenges they must face. As she polishes her power at the Red Prison with the help of her loyal familiar Chomusuke and her adorable little sister Komekko, Megumin aims to become the greatest explosion wizard of all time!

Joe Higan is a Nukenin – a former ninja who escaped his clan and is hiding from his violent past in rural America with his family. One night, he is ambushed by a team of assassins from his former organization who exact a bloody retribution on Joe and his family for betraying their ancient code. Rising from his seeming "death," Joe will re-emerge as his former self – Ninja Kamui – to avenge his family and friends. Kamui is a 21st century ninja, a shadowy anachronism who pits his ancient skills against high-tech weaponry with brutal finesse. He must face off against trained assassins, combat cyborgs, and rival ninjas to bring down the very clan that made him.

Phantoms: supernatural entities such as ghosts or youkai that, until recently, were thought to be superstition. However, when a virus that infects the brain spreads throughout society, people's perception of the world changes as the mythical beings are revealed to have been living alongside humanity the entire time. This virus has also affected those of the next generation significantly, allowing them to develop special abilities that they can use to fight against dangerous phantoms. Haruhiko Ichijou and Mai Kawakami are two of those that were granted such power as Haruhiko wields the ability to summon and seal phantoms through drawings while Mai imbues the power of the elements into martial arts. Together, along with the friendly phantom Ruru, they form Team E of Hosea Academy which is dedicated to dealing with these often mischievous beings. In a world where the real and surreal intertwine, Musaigen no Phantom World follows the adventures of a group of friends as they handle the everyday troubles caused by phantoms. [Written by MAL Rewrite]