Akuma no Riddle Wiki
10t year's Black Class room sign

The Black Class (黒組; Kuro-gumi) is a special freshman class that exists at Myojo Academy. In the story, it is being conducted by Meichi Yuri. While it appears like a normal school class on the surface, it is actually an initiation site for an influential and unnamed clan. This clan's members include Meichi and Haru Ichinose. The initiation process is a survival game to see if the female candidate, upon reaching the age of 15, possesses the Queen Bee Primer necessary to rule the clan. In chapter 39, it is stated that the Black Class is special in that the students who pass the school year graduate right away instead of moving to the next grade.

In the series Akuma no Riddle, the Black Class featured is the 10th year (10年黒組; Jū-nen Kuro-gumi). It consists of 12 assassins and Haru, who has to survive the attempts on her life in order to graduate. She is promised a normal life if she succeeds, but chairwoman Yuri merely wants to observe her capabilities to become queen.

The class accepts enrollments at irregular intervals, and multiple Black Classes have existed since the Academy founding. The class itself usually does not exist and opens on special years. This information, while unknown to the public, is known in assassin circles, including Academy 17. Generally, the existence of Black Class is kept a secret from all the other classes in the Academy, save for special circumstances, like the Venus Festival. Students like to gossip about the class' existence, hypothesizing that it is a class of idols and such.

Rules of the Game[]

  • Each of the 12 assassins are given one warning letter to be sent to Haru before their assassination attempt. An assassin can only send a letter once in the game. The inclusion of the assassin's name within the letter itself is not a requirement.
  • An assassin is given 48 hours after Haru receives the letter to assassinate her. Multiple letters can be received at a time, therefore the 48 hours allotted to each assassin may overlap. Failure to succeed within those 48 hours will result in immediate expulsion from the class.
  • Outside parties such as other students or teachers cannot be involved in the competition, although assassins within the class may freely involve one another in their assassination attempts. Involving outside parties, whether intentionally or otherwise, will result in immediate expulsion from the class.
  • If an assassination attempt is successful, that assassin will be rewarded with any one thing they desire. If the reward requested does not solely benefit the assassin herself, then the reward will still be given regardless of whether the assassin is killed in the process.
  • For example, Haruki Sagae requested for her family to be fed for the rest of their lives, therefore even if she were to die, her family would still receive the reward

 10th year's Black Class members[]


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Black Class Students



  • According to Chapter 0 of the manga, the last Black Class before the series begins lasted only 2 weeks.