Ten years ago, Jiang Xiaobai lost all his memories due to a traumatic event he no longer remembers. Now working as a trainee in Editorial Office No.2 of Wen Zheng Magazine, a literary periodical based in Chongqing, he is excited to begin a new chapter of his life: in two days, he finishes his probationary period and officially starts his job as an editor. He gives no thought to his recurring dream of a girl whose face can never clearly see. That evening, one of Jiang Xiaobai's seniors passes him the task of rushing to the airport to escort the idiosyncratic rising author Tong Li, who has returned from America to launch her first serialized novel in Chinese. As punishment for this senior reneging on his own duties, Jiang Xiaobai replaces him as Tong Li's new editor. Though they get off to a rough start, Tong Li soon recognizes Jiang Xiaobai as someone precious from her high school days. Before they know it, the wheels of fate are set in motion, as Jiang Xiaobai slowly uncovers clues about a long-forgotten girl from his past. [Written by MAL Rewrite]

With many of its central personnel lost in the war, the Earth Federation Government is forced to rebuild, and Brian Midcrid, president of the Unified Colonies, takes the position of its president. During an emergency session of the Federation Diet, he publicly acknowledges the existence of extraterrestrials, and reveals the events of the L5 campaign to the masses in what will later come to be called the "Tokyo Declaration." He goes on to state that these aliens pose a serious threat to humanity. (Source: Crunchyroll)

Episode 0, consisting of two subepisodes: "Sekirei Shindan" (鶺鴒診断) and "Sekirei Yoka" (鶺鴒余暇), of Sekirei: Pure Engagement included on the first DVD/BD volume.

Unaired TV episode bundled with the light novel's volume eight.