Ron Kamonohashi’s Forbidden Deductions follows the titular character, a private investigator, who teams up with a police detective to solve cases five years after a shocking incident got his detective license revoked.
Warning: This article contains heavy spoilers
Plot summary
Totomaru Isshiki, an unskilled but hard-working and kind-hearted police detective, joins hands with the eccentric private investigator Ron Kamonohashi to solve mysterious cases.
They also befriend Spitz Feier, an instructor from BLUE, the detective training academy where Ron used to be a top student five years ago.
He was expelled and his detective license was revoked after he was found responsible for a deadly incident.
Now he must solve cases from behind and make it look like Isshiki is doing all the work.
One of the cases the duo works on eventually is that of Spitz’s missing brother, who’s finally found.
Meanwhile, Ron learns more about his own past and that deadly incident, and also the ones behind his misery.
Ending explained:
Spitz Feier’s missing family
Spitz Feir, the affable instructor from Blue, has been searching for his missing brother, Shepherd. He goes to the man everyone tells him can find his missing brother — Ron Kamonohashi.
He tracks him down after volunteering to investigate if Ron has resumed his detective work. He befriends him and Toto and helps them in the cases moving forward.
Ron finally agrees to help him and they go to the Yadagami village, where his brother went missing. There, they solve the murder of the government surveyor.
They later find that the village chief killed him, who had been helping Shepherd hide in the village after a mysterious organization went after him.
The surveyor found out and threatened to expose the truth unless he was compensated.
When the chief killed the surveyor, he did so to prevent from the dam being built, which the villagers have always been opposing.
He also killed him so that Shepherd does not face risks, since his granddaughter Mii has feelings for him.
Shepherd decides to give himself up to Toto because he feels he can’t keep hiding at the expense of other people’s happiness.
However, Toto refuses to do so and Ron also turns away. Spitz thanks them inside his mind and feels indebted to them for reuniting him with his brother.
The Bloody Practical Training Case
Ron Kamonohashi was the top student of the BLUE Detective Training Academy. He was a generational talent who had solved even the cases that were supposed to be unsolvable for centuries.
During one practical training exercise, wherein BLUE worked with the Scotland Yard in a cooperative effort and a lesson to catch a real criminal, Ron participated.
His deduction skills helped them track down the location of a group of seven murderers.
However, when the police arrived at the hideout, they saw Ron standing in the middle of the murderers, who lay dead all around him.
He stands in a daze, drenched in blood and holding a bloodied weapon. He has no memory of thirty minutes before the incident and thirty minutes after it.
Due to this, he’s deemed not guilty for reasons of insanity. However, his license is revoked and he’s expelled from BLUE.
The M. Family
When Spitz goes to steal BLUE’s file on the Bloody Practical Training Case, he is confronted by the principal Aimee Emmerich, who sends a message to Ron.
She reveals that the files on the case have been destroyed both at the Scotland Yard as well as at BLUE.
She also reveals that blood that belonged to neither the murderers nor Ron, was found at the scene.
She then tells him that the scar he has on his neck, which is likely the reason why he pressures the criminals into killing themselves, was given to him during the treatment.
To pull off such a strategy and orchestrate all this, she believes that the one responsible for all this is the M. Family.
The family is the world’s most elusive and feared criminal organization.
However, unbeknownst to Ron Kamonohashi, he’s related to the family.
He’s a ninth-generation descendant of James Moriarty — the progenitor and the first leader of the family.
He’s also a sixth-generation descendant of Sherlock Holmes — the arch-nemesis of James Moriarty.
Throughout the years, Holmes’ descendants have been spoiling the M. Family’s perfect plans.
This is the reason why Mylo, the current leader of the family, is after Ron Kamonohashi.
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