Akuma no Riddle: Shousha wa Dare? Nukiuchi Test

悪魔のリドル　勝者はだれ？（抜き打ちテスト）

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.