Ep. 22: Akiha and Itsuki escape Nervalists while Honoka kidnaps Fon and the group rescues traumatized box humans from a disposal factory.

After Itsuki rescues Akiha, their student council ship is chased by Nervalists and hides in Kirkwood. The UURE, controlling the moon, plans an attack, but Nerval freezes the entire moon, interrupting their scheme. On Earth, Honoka forces Fon to accompany her by hitting him with a bowling pin. Akiha struggles with Imo-chan's absence as she, Itsuki, and the council discover a box human factory. They meet a Shishido elder who guides them to a disposal site where they rescue people pretending to be dead, hiding them in Kirkwood. Many survivors remain traumatized and desire their boxes. Xanthippe attacks to stop their escape, but Benkei intervenes by ramming her. Encouraged by Tsutsuji, Benkei aids the rebels alongside Takane, who has broken free from Nerval's control. Benkei transports everyone to the Innsmouth Reef, where they encounter Leopard.
Episodes
- Ep. 18 · Nami retreats while Benkei steals mirrors, leading to a party that helps Leopard reconnect before Akiha is kidnapped by Aleida.
- Ep. 19 · Tsutsuji and Benkei face Leopard while Nina's team investigates the underground colony
- Ep. 20 · Akiha Wakes in Box as Honoka's Lifespan Ends and Nami Is Stabbed
- Ep. 21 · Leopard searches for the Sword while Akiha escapes her box before UURE attacks Kirkwood.
- Ep. 22 · Akiha and Itsuki escape Nervalists while Honoka kidnaps Fon and the group rescues traumatized box humans from a disposal factory.
- Ep. 23 · Leopard completes with the sword while Akiha confronts her grief and enemies.
- Ep. 24 · Nerval reveals missile truth while Leopard succumbs to Dark Leopard and declares war on humanity.
- Ep. 25 · Nerval and Nami clash as Akiha discovers her destiny to end the brain colony wars.
- Ep. 26 · Kazane coordinates the assault on Leopard while Kagura confronts Nami and Xanthippe arrives to assist.