The always-hungry Yako Katsuragi is a super famous high school-aged detective who cracks the hardest of cases with ease – at least, that’s what the general populace thinks! Behind the scenes, Yako is helped by Neuro – a maniacal being from the demon world who is looking for new mysteries to devour. Alongside local detectives and a helpful sidekick, Yako and Neuro will solve the unique and the bizarre cases that plague the city; but will Yako ever discover the truth behind her father’s supposed "suicide"?
In Victorian England it is commonplace for the rich and wealthy to have a staff, led by a head butler, to run their households; the Phantomhive Estate is no different. The young and demanding Count Ciel Phantomhive, child owner of a toy company, lives in the grand countryside manor. Sebastian is his head butler, and the epitome of perfection; he effortlessly and gracefully completes his day-to day chores and fixes the countless mistakes of the other employees. However, whilst on the outside all seems prim and proper, a more sinister secret lies just beneath the surface. Sebastian is in fact a demon bound by a contract with the young count; he will loyally serve and fight for him in return for his soul.
Both series contain side glances of humor (Neuro more then Kuroshitsuji), mystery, action, and supernatural events. Both Kuroshitsuji and MTNN is about a demon and a human partner that team up together ( Ciel and Sebastian under contract, while Neuro forced Yako into servitude) solving msyteries that arise. Battling unnatural and natural people to get closer to their goals (Neuro the ultimate myster and Ciel his revenge.).
If you liked the comedy, the supernatural taste, along with myster and action of Kuroshitsuji then you might like Majin Tantei Nougami Neuro (or vice versa).
In a bizarre fantasy world, students known as meisters are trained at the illustrious Shinigami Weapon Meister University; but the tools they wield are no ordinary weapons! Each meister is paired with a human-like being who can transform into a weapon at will; and after defeating a pre-kishin - a human whose soul has darkened - the weapon eats the soul within it. A meister's ultimate goal is to collect ninety-nine pre-kishin souls and one of a witch so that his or her partner will become an all-powerful Death Scythe. Maka and her partner Soul Eater; Assassin Black Star and his partner Demon Blade Tsubaki; and Shinigami's son Death the Kid and his partners the Demon Twin Pistol Thompson Sisters each vie for their ultimate goal, but plenty of challenges and adventures lie in their way!
The stories are not very alike but they both have supernatural elements. Majin Tantei Nougami Neuro with, it's wonderfully funny sadistic demon and Soul Eater, with it's witches and people being able to change into weapons. If you like one you'll like the other is that the art styles are similar. Not exact but close enough to remind me of each other when reading.