Trinity Seven: Heavens Library & Crimson Lord

劇場版トリニティセブン -天空図書館と真紅の魔王

Arata, Lilith and the rest of the Trinity Seven ace off against their greatest enemy; Lilith's own father, who is revealed to be the strongest Demon Lord. He challenges Arata who is now a Demon Lord candidate. (Source: Anime News Network)