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.
I wouldn't mind spending 
eternity here with you,
Ich wäre gerne eine Ewigkeit
hier mit dir zusammen,
No me molestaría quedarme aquí 
contigo por toda la eternidad,
No me importaría quedarme aquí 
contigo por toda la eternidad,
On pourrait aussi vivre ensemble
pour toujours…
Non voglio certo passare l'eternità qui con te,
Eu não me importaria de passar 
a eternidade aqui com você,