Vietsub - HD Akuma no Riddle OVA Akuma no Riddle Special | Riddle Story of Devil Special | Akuma no Riddle Episode 13
Vietsub - HD OVA/12 Tsuujou Kougeki ga Zentai Kougeki de Nikai Kougeki no Okaasan wa Suki Desuka Tsuujou Kougeki ga Zentai Kougeki de Nikai Kougeki no Okaasan wa Suki Desuka