The ultimate demon lord, Astral Trinity, shows up in the form of Arata with a grotesque new appearance. Hijiri appears as well, and the others discover that she is a high-level mage whose goal is to kill Arata and destroy the school.
Go to sleep, Demon Lord.
Geh schlafen, Teufel.
Vete a dormir, rey demonio.
Vete a dormir, Rey Demonio.
Il est temps de te reposer,
maître magicien.
Tornatene a dormire, Signore dei Demoni.
Hora de dormir, Lorde Demônio.