Heavens Library & Crimson Lord brings back Arata, Lilith and the rest of the Trinity Seven to face off against the greatest enemy in the history of the Trinity Seven; Lilith’s own father, who is revealed to be the strongest Demon Lord who challenges Arata who is now a Demon Lord candidate.
I am this world's demon lord!
!أنا هو الملك الشيطانيّ لهذا العالم
Ich bin der Teufel dieser Welt!
¡Soy el rey demonio de este mundo!
¡Soy el rey demonio de este mundo!
Je suis le maître de ce monde !
Sono il Signore dei Demoni di questo mondo!
Sou o lorde demônio deste mundo!