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.
And there's no way he'll change just 
because he's a demon lord now.
.ومن المستحيل أن يتغيّر فقط لأنه أصبح ملكًا شيطانيًّا الآن
Y no cambiará
al convertirse en rey demonio.
Y no cambiará
al convertirse en rey demonio.
E quindi è impossibile che cambi 
solo perché è diventato un Signore dei Demoni.