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Trinity Seven the Movie: The Eternal Library and the Alchemist Girl is a 2017 Japanese animated romantic comedy fantasy film directed by Hiroshi Nishikiori and written by Kenji Satō based on the Trinity Seven manga series, which Satō co-created with Akinari Nao. Produced by Seven Arcs and distributed by Avex Pictures, The Eternal Library and the Alchemist Girl marks the first film in the series, and involves the Trinity Seven encountering a White Demon Lord that was sealed inside the Eternal Library, while Arata and Lilith encounters a mysterious girl named Lilim. The film stars the voices of Yoshitsugu Matsuoka, Yumi Hara, Aya Uchida, Ayane Sakura, Yōko Hikasa, Ryoka Yuzuki, Rie Murakawa, Nao Tōyama, and Aya Suzaki. The Eternal Library and the Alchemist Girl was released in Japan on February 25, 2017.