Akuma no Riddle: Shousha wa Dare? Nukiuchi Test 6.54
Other Name: Akuma no Riddle Special, Riddle Story of Devil Special, Akuma no Riddle Episode 13, 悪魔のリドル 勝者はだれ?(抜き打ちテスト)
Summary: Unaired episode 13 of Akuma no Riddle released with the seventh Blu-ray/DVD volume.
HashTags: #Akuma no Riddle