Trinity Seven: Eternity Library & Alchemic Girl

 is a movie released in February 25, 2017 based on the Trinity Seven manga series by Kenji Saito and Nao Akinari.

Synopsis
The film's story begins when Arata inadvertently touches "Hermes Apocrypha," Lilith's Grimoire. Suddenly, he is enveloped by a bright white light, and a girl appears before him. She calls herself Lilim, and treats both Arata and Lilith as her parents. At the same time she appears, something changes in the world. The forbidden Eternal Library awakens. In the Library is sealed the ultimate culmination of Alchemy, the White Demon Lord. The White Demon Lord plots to eliminate Arata and the Trinity Seven to usurp the position of Demon Lord. Bristling with untold power, the White Demon Lord attacks Arata, and triggers a desperate crisis where Arata and the Trinity Seven must save the world in this last battle.

Staff

 * Director: Hiroshi Nishikiori
 * Script:
 * Kenji Saito
 * Hiroyuki Yoshino
 * Chief Animation Director: Shinpei Tomooka
 * Character Design: Shinpei Tomooka
 * Creature Design: Yasuhiro Moriki
 * Weapon Design: Akira Otsuka


 * Prop Design: Chikai Okado
 * Art Director: Kinichi Okubo/HIJIRI
 * Art Design: Hiroshi Izumi
 * Color Design: Kaoru Nishimura
 * Director of Photography: Megumi Enomoto
 * Special Effects: Naomasa Fukuda
 * 3D CG: Naoto Yamaguchi
 * Editing: Kazuhiko Seki
 * Sound Director: Yasunori Ebina
 * Sound Effects: Studio Mausu
 * Music Production:
 * Avex Pictures
 * TV Tokyo Music

Music
On November 7, 2016, the official website announced that ZAQ would be performing the opening theme, Last Proof, with the single scheduled to be released on January 25, 2017.

On February 25, 2017, the musical duo Polka Dots, consisting of i☆Ris member Himika Akaneya and Mimi Meme MIMI member Yuki Takao, was announced to perform their debut song "Lost Days -Piano ver.-" as insert, releasing on the same day as well. Notably, Akaneya provided the lyrics while Takao composed the music.


 * Composer: TECHNOBOYS PULCRAFT GREEN-FUND
 * Opening Theme: Last Proof by ZAQ
 * Character Single: THANKSGIVING ≡ LYRICS by LILIc's (Lilith & Lilim)
 * Insert Song: Lost Days -Piano ver.- by Polka Dots (Himika Akaneya and Yuki Takao)

Autographs
In celebration, an autograph by one of the Trinity Seven voice actresses were released each day before the release date.

On February 17, 2017, an autograph by Nao Touyama was prematurely released on both the official site and Twitter. The next day, the mistake was realized and the same autograph was again released.

Afterwards, Rie Murakawa's autograph was released on February 19, Ryouka Yuzuki on the 20th, Yoko Hikasa on the 21st, Ayane Sakura on the 22nd, Aya Uchida on the 23rd and lastly Yumi Hara on the 24th.

License
On March 16, 2017, Crunchyroll announced that the service would stream the movie the next day.

Trivia

 * The movie was formally announced in Monthly Dragon Age August 2016 issue on July 9, 2016.
 * All of the staff previously worked on the first season of the Trinity Seven anime.
 * ZAQ also perfomed the opening theme of the anime, Seven Doors.
 * On December 6, 2016, 777 limited seven-ticket set was announced to be on sale at the theaters starting December 17.