Akuma no Riddle: Shousha wa Dare? Nukiuchi Test
English title: Riddle Story of Devil: Who's the Winner?
Japanese title: 悪魔のリドル　勝者はだれ？（抜き打ちテスト）
Type: Special
Episodes: 1
Source: Manga
Genres: Action, Comedy, Girls Love, Ecchi
Studios: Diomedéa
Producers: Pony Canyon
Duration: 23 min
Rating: R - 17+ (violence & profanity)

Unaired episode 13 of Akuma no Riddle released with the seventh Blu-ray/DVD volume.

The special will be previewed at a screening in Tokyo City on November 22, 2014. The BD/DVD will be released on December 17, 2014.