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.
As my prophecy foretold, it seems the 
Crimson Demon Lord has awakened,
،كما توقّعته نبوءتي، يبدو أنّ الملك الشيطانيّ القرمزيّ قد استفاق
Wie ich schon prophezeit habe,
ist der scharlachrote Teufel erwacht
Como predije, despertó
el Rey Demonio Carmesí,
Como predije, despertó
el Rey Demonio Carmesí
Comme dans ma prédiction,
le maître pourpre s’est éveillé
Come aveva predetto la mia profezia, 
il Signore dei Demoni Cremisi si è risvegliato,