How long does it take to watch all of Akuma no Riddle?

About 4.6 hours for all 12 episodes at 23 min each — a weekend; at two episodes a night that is 6 evenings.

Is Akuma no Riddle finished?

Yes, Akuma no Riddle is finished (12 episodes), so you can watch the whole thing at your own pace.

Is Akuma no Riddle good for a group?

Better for two than for a crowd. Akuma no Riddle is tagged drama, psychological, tragedy; it rewards paying attention, which a group rarely does.

Where is Akuma no Riddle listed?

Akuma no Riddle is on AniList (id 19429) and MyAnimeList (id 19429); Queue Up keys it by its AniList id and shows it when it is on either of your lists.

Queue Up — what anime do we watch?Compare two AniList lists →

Anime lists › Best survival anime to watch with a friend

Is Akuma no Riddle good to watch with a friend?

A quiet night. Akuma no Riddle (Riddle Story of Devil) is a TV series from Spring 2014 by Diomedea, Diomedéa Inc.: 12 episodes, about 4.6 hours in total, finished, 6.78/10 across the listing sites.

actionmanga adaptationcoming of agecrimerobots & AIdetectivedramapsychological

Watching it together: a quiet night. Tagged psychological, thriller, tragedy and not comedy: this wants attention and the right mood, not background chatter. Rule: heavy drama or psychological tags without comedy → quiet night.

This verdict comes from rules over the title's format, length and tags, not from a review — the rule that fired is named above.

The facts

Type: TV series
Episodes: 12
Episode length: 23 min
Total time: about 4.6 hours — a weekend
First aired: Spring 2014
Status: Finished
Studio: Diomedea, Diomedéa Inc.
Score: 6.78/10 across the listing sites
Tags: action, manga adaptation, coming of age, crime, robots & AI, detective, drama, psychological, school, seinen, survival, thriller, swordplay, tragedy, violence, yuri

Data from anime-offline-database (ODbL) as of 2026-07-04; the score is the median of the scores the anime listing sites give it, on a 1–10 scale. Also listed as: The Demon Riddle.

Do you and a friend both want to watch Akuma no Riddle?

Queue Up reads two public AniList lists and shows every anime you both have on Planning — with Akuma no Riddle flagged if it is one of them — then picks tonight's with a weighted roll or a bracket.

Or open it on AniList or MyAnimeList.

More like this: action · manga adaptation · coming of age · crime · robots & AI · detective · drama · psychological · school · seinen · survival · thriller · swordplay · tragedy · yuri.

Quick answers

How long does it take to watch all of Akuma no Riddle?: About 4.6 hours for all 12 episodes at 23 min each — a weekend; at two episodes a night that is 6 evenings.
How many episodes does Akuma no Riddle have?: 12 episodes of 23 min.
Is Akuma no Riddle finished?: Yes, Akuma no Riddle is finished (12 episodes), so you can watch the whole thing at your own pace.
Is Akuma no Riddle good for a group?: Better for two than for a crowd. Akuma no Riddle is tagged drama, psychological, tragedy; it rewards paying attention, which a group rarely does.
Where is Akuma no Riddle listed?: Akuma no Riddle is on AniList (id 19429) and MyAnimeList (id 19429); Queue Up keys it by its AniList id and shows it when it is on either of your lists.

Queue Up is a free tool: enter two AniList usernames and it ranks the anime you both want to watch, rolls one for tonight, runs a bracket to settle it and finds new anime that fit both of you. List data from AniList; title data: anime-offline-database (ODbL), dataset of 2026-07-04; page updated 2026-07-04. Not affiliated with AniList or MyAnimeList. Queue Up is a Somebody Decide program. How it works · Legal & privacy · All lists