悪魔のリドル 勝者はだれ？（抜き打ちテスト）
Akuma no Riddle: Shousha wa Dare? Nukiuchi Test
SPECIAL R HD Sub 1 Dub 1
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.