[15] A sequel series, titled Muhyo to Roji no Mahōritsu Sōdan Jimusho: Mazoku Magushi-hen (ムヒョとロージーの魔法律相談事務所 魔属魔具師編, "Muhyo & Roji's Bureau of Supernatural Investigation: Magical Genus Magic Tool Master Chapter") was serialized in Shōnen Jump+ app from March 19, 2018, to March 7, 2019.
[21][22] Nobuhiro Kondo directed the series, while scripts were handled by Yasuyuki Suzuki, music composed by Ryo Kawasaki, characters designed by Kouichiro Kawano, and Kazuko Tadano and Hiromi Matsushita serving as chief animation directors.
After Muhyo demonstrates magical law with the sentence via death by exorcism for the crime of unsolicited animal spirit parasitism, Rie explains the rumor about the fifth track at Hashiki Station being haunted by a ghost girl named Taeko Okazaki.
A troublemaking boy named Kenji Satō breaks Muhyo and Roji's office sign, claiming his disbelief in ghosts.
Kenji later introduces Muhyo and Roji to his friend Nana Takenouchi, a photographer whose pictures feature a troubled spirit.
Muhyo and Roji tell Aya Shiratori, a talented pianist, that her piano is covered in spirit traces.
It is explained that living human beings emit spirit energy caused by intense emotions including hatred.
The bridge ghost eventually captures Nana, but Muhyo arrives in time and tells Roji to attack by using talismans when written with the magic-sealing pen.
Muhyo and Yoichi stop by a restaurant in order to discuss the murder of two magical law enforcers named Elena Lily and Sosei Okouchi.
Yoichi tells Muhyo that their former classmate turned traitor Soratsugu "Enchu" Madoka is presumed to be hiding somewhere in the Shin'etsu region.
Roji blames himself for panicking, but Yoichi explains that he and Muhyo used to be inseparable friends with Enchu when they all were classmates.
Unable to see his mother in critical condition, Enchu went insane when Muhyo became promoted as a magical law enforcer.
Muhyo, Roji and Nana meet a romance novel author named Abeyuki Yontani in an inn at Nanagase Hot Springs.
At night, Roji uses a talisman outside Yontani's room in order to expose a bound spirit named Zansetsu Hirata, who was an author from the Meiji era stricken with tuberculosis but found relief in the hot springs.
Hirata was inspired to start writing the romance novel after he fell in love with a girl named Yuri, who was also diagnosed with tuberculosis before she died.
When Hirata later died, his spirit took the form of countless authors including Yontani in order to continue writing the romance novel.
Muhyo later prepares to perform exorcism in the bathhouse, causing Hirata to reveal his monstrous form and take Nana as a hostage.
A few hours later, they dock at an island in the Pacific Ocean and meet Biko's teacher Rio Kurotori outside the magic prison.
Realizing that the talisman had a weak seal, Muhyo, Roji, Biko and Rio enter the magic prison and head towards the bottom level.
When Muhyo, Roji, Biko and Rio find a prison cell without a talisman, they encounter Red-Eye, an evil spirit who collects human eyes.