Dengeki 25th Anniversary Dengekibunko Autumn Festival 2017 ( 電撃25周年記念 電撃文庫 秋の祭典2017 ) was held at Akihabara UDX & Belle Salle Akihabara ( 秋葉原UDX & ベルサール秋葉原 ) on October 01, 2017. This festival included the stage event for the works of Dengeki, cosplayers, autograph session of the light novel arthors and illustrators, and lots more!

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