剧场版 七人魔法使 天空图书馆与真红的魔王

Lilith is in danger――. The most dangerous Demon Lord in Trinity Seven history has arrived! Arata Kasuga, a Demon Lord candidate possessing the "Demon Lord Factor" said to bring about the world's destruction, was investigating a certain ruin alongside Lilith Asami, one of the Trinity Seven. Suddenly, a dazzling light poured down from the sky. What appeared was a mysterious hooded man who looked exactly like Arata. The shocking truth he revealed, as he sought to reclaim his power as the Demon Lord and reduce the world to nothingness― Lilith was the daughter of the strongest Demon Lord…!? Demon Lord candidate vs. the strongest Demon Lord. Arata faces the greatest crisis in the history of "Trinity Seven"―.