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.
The power of a demon lord 
cannot be measured!
!لا يمكن قياس قوّة ملكٍ شيطانيّ
Die Macht des Teufels
ist unermesslich!
El poder de un rey demonio
es inconmensurable.
El poder de un rey demonio
es inconmensurable.
Mon pouvoir est sans limite !
Il potere di un Signore dei Demoni è incalcolabile!
O poder de um lorde demônio
não pode ser medido!