|How to Distinguish a Congratulation from a Curse|
|Romaji Title||Kotohogi to Noroi no Miwake-kata|
|English Title||How to Distinguish a Congratulation from a Curse.|
|Airdate||June 12, 2014|
|Opening||Soushou Innocence by Maaya Uchida|
|Ending||Survival by Yoshino Nanjō as Nio Hashiri|
|Previous Episode||Episode 10|
|Next Episode||Episode 12|
How to Distinguish a "Congratulation" from a "Curse" (祝(ことほぎ)と呪いの見分け方; Kotohogi to Noroi no Miwake-kata) is the eleventh episode of the Akuma no Riddle anime series and was released on June 12, 2014.
With all the other assassins defeated, Nio Hashiri announces there will be an orientation held at midnight revealing the secret behind the "Black Class", implying that Haru Ichinose already knows something.
That night, Tokaku Azuma and Haru arrive at the orientation, where they are greeted by the Myōjō Academy Board Chairwoman, Yuri Meichi, who reveals the Class Black was designed as a test to see if Haru could survive against twelve assassins and become a successor for their clan, who control most of the world.
Yuri implies that Haru, consciously or not, allegedly has the power to manipulate and control others into protecting her, which Haru refuses to acknowledge. As Haru runs off in denial, Yuri asks Tokaku to think of a wish she wants granted for winning Class Black.
That night, as Tokaku feels she had been manipulated the entire time, with no way for Haru to prove otherwise, Kaiba tells her that all of the riddles he had sent her have no "right" answers, tasking Tokaku with finding her own answers.
Meanwhile, after Haru asks Yuri to let her leave the clan and live a normal life, Nio takes her to their clan's cemetery, which Myōjō Academy was built upon, giving her some time to reflect on things. After spending time with her family's grave, Haru is approached by Tokaku, who delivers her own advanced notice and draws her sword against her.