Ep. 21: Shu infiltrates GHQ to rescue Inori while allies clash with Gai and Yuu in a desperate battle.
Aired on March 16, 2012

With the UN and Undertakers attacking GHQ Headquarters, Shu pilots a Steiner Endlave to save Inori and stop Gai. Gai utilizes the voids of Yuu, Kenji, and Arisa to crush the UN forces, prompting Shuichiro to order a counterattack. Daryl joins the fray in his Gespenst Endlave after losing his void. Tsugumi’s group hacks the base, enabling a UN counteroffensive. Inside, Gai questions Inori about her love for Shu before her transformation. Inori sings a song only Shu hears, guiding him to the center. Yuu confronts Shu, revealing himself as Daath’s will and offering him the title of Adam, which Shu rejects. Shu defends Inori’s humanity, defeating Yuu. Yuu allows Shu to proceed, where Gai reveals Inori has fully transformed into Mana.
Episodes
- Ep. 17 · Shu faces betrayal and Gai's attack during the escape from the blockade.
- Ep. 18 · Gai sacrifices coup leaders to stop bombers while Inori transforms to protect Shu from capture
- Ep. 19 · Shu Injects the Void Genome and Defeats Segai After Absorbing Souta's Infection
- Ep. 20 · Diary of Remembrance: Mana's Control and the Apocalypse Virus History
- Ep. 21 · Shu infiltrates GHQ to rescue Inori while allies clash with Gai and Yuu in a desperate battle.
- Ep. 22 · Mana triggers the Fourth Apocalypse while Shu defeats Gai and sacrifices himself to cure the world.