Rin Okumura, a boy aiming to become an exorcist yet born the illegitimate son of the demon god Satan, advises his classmate Sei Godaiin, who begins to see demons. Despite Rin asking Ryuji Suguro and the other Exwires attending the Exorcism Cram School for a way to make demons invisible, he is unable to find a solution. Meanwhile, Rin is invited to dinner by Mephisto Pheles, the Preceptor of the Japan Branch of the Knights of the True Cross and director of the True Cross Academy. However...
and the day comes that we can't rely on you,
what are you going to do?
وحان اليوم الّذي لن نستطيع فيه
الاعتماد عليك، فما الّذي ستفعله؟
Was, wenn wir im Notfall einmal
nicht auf dich zurückgreifen können?
¿qué haremos cuando no contemos contigo?
¿qué haremos cuando no contemos contigo?
quid du jour où on ne pourra plus
se reposer sur toi ?
Come faremo se,
 un giorno, non potessimo farlo?
e chegar o dia que não pudermos
contar com você, o que faremos?
А если тебя однажды не окажется рядом?
แล้วถ้าถึงตอนที่พึ่งคุณไม่ได้จะเป็นยังไง?