For nearly a millennium, demons have imposed a magical barrier that has impeded the people trapped within it from reaching the outside world. Now that it is broken, several kingdoms seek to explore the lands that were once beyond their grasp. To this end, they establish a peace delegation to make contact with the inhabitants of the new world. Meanwhile, the young sorceress Lina Inverse receives a message from a mysterious woman named Filia ul Copt. When they meet, Filia expresses interest in hiring Lina and her friends, having heard of their great deeds, for a certain task that will take them to the outside realm. Despite that, Filia feels the need to put their strength to the test and pits them against a dragon in the middle of the city! After proving themselves, the sorceress and her fellow adventurers set off for the unexplored lands, where many adventures and a worrying prophecy await them. [Written by MAL Rewrite]

Two side stories: Chapter L (or chapter 25) about Lohmeyer/Romaiya senpai. Chapter F (or chapter 26) about Miwako finding ways to make fun of Yamazaki. (Source: momento)

The story begins on a rainy night, when a homeless little black cat is brought home by a young girl Luo Xiaobai. She names the cat Luo Xiao Hei. However, Luo Xiao Hei is no ordinary cat: he is a supernatural entity that hosts several small creatures called Heixiu. As Luo Xiao Hei new life soon threatened by the mysterious Diting, who commands three winged wolves.

Following the events of Senki Zesshou Symphogear G, Hibiki Tachibana, Tsubasa Kazanari, and Chris Yukine continue to operate under the command of Genjuurou Kazanari. Meanwhile, Maria Cadenzavna Eve, Kirika Akatsuki, and Shirabe Tsukuyomi are taken into protective custody. With peace restored, everyone returns to their daily lives; however, the appearance of the alchemist Carol Malus Dienheim and her subordinates—the "Autoscorers"—threatens to draw everyone back into a conflict. Armed with a strange and magical power, Carol wishes to initiate the apocalypse and bring destruction to the world... and she is willing to sacrifice everything to do so. Against this mysterious new foe, the six Symphogear wielders must rise to the challenge in order to protect what they hold dear. However, will Carol and her Autoscorers prove to be too much to handle in this fight to protect the fate of the world? [Written by MAL Rewrite]