Aileen finds out that Claude's aide, Keith Eigrid, has been selling demons. Keith tells Aileen about the reason why and reminisces about their past. Now that Aileen knows his true feelings, she decides to cooperate with Keith to prevent Claude from despairing about humanity and turning into a demon. At the same time, Cédric and Lilia visits the demon lord's castle to tell Claude Keith's secret?!
Even if the holy sword 
doesn't work on humans...
...حتّى وإن كان السيف المقدس لا يؤثر على البشر
Das Schwert kann Menschen
zwar nichts anhaben, aber …
Aunque la espada no tenga efecto
sobre los humanos…
Aunque la espada no tenga efecto
sobre los humanos…
Même si l’épée
n’a aucun effet sur les humains…
Certo, la Spada Sacra 
non dovrebbe avere effetto sugli umani...
Mesmo que a Espada Sagrada
não funcione em humanos...
Пусть даже святой меч
и не ранит людей, но всё же!