Summary Act II

Nagisa wakes up aboard Iczer Robot where Iczer-One has bring her again so that she may rest safely. Nagisa still refuses to help Iczer-One and blames her for everything.

During that time, monsters continue to spread all over the world, infiltrating and destroying even the most secure of the human military bases.

Sir Violet, the Cthuwulf leader presents to Sepia her new partner : Iczer-2 !

Iczer-One has to leave Nagisa to try to infiltrate the Nova fortress but before she does so, she gave her some outfits that should protect her if the need arise and tell her that humanity and even girl like her will have to learn to fight if they want to survive.
Nagisa goes back to her home but a monster attacks her. She is protected by Iczer-One bracelet that kills the monster. Near her home, she meets a very young girl, Sayoko, who is crying over the unconscious body of her mother. Nagisa bring them both to her house, which is now empty.

Iczer-One

While going near the Nova fortress, the enemy spots Iczer-One and she is trapped in another dimension where she is attacked by a Void.

Just before they lost the Fuji base, the army managed to lunch the Fuji-2 flying fortress.

Iczer-One kills the Void that is attacking her but it wasn't alone and another one takes its place. In our dimension, more monsters attack Nagisa and Sayoko's mother is turned into a beast. Nagisa try to call Iczer-One for help but she is currently busy fighting the Void and she tells Nagisa that she is on her own.
Nagisa uses Iczer-One's bracelet to defeat the monsters.

The Fuji-2 arrives near the enemy fortress and attacks it with the help of ground forces but they are all destroyed with a single counter-attack of the Nova.

Iczer-One manages to escape the dimension and comes back to our world where she quickly defeats the remaining Void but she is then attacked by Iczer-2, her sister ! Already exhausted by her previous fights and surprised to discover herself a sister, she can't fight Iczer-2 and she is wounded at the shoulder by her.

Nagisa, attacked by yet other monsters, call Iczer Robot for help. Answering to her summon, Iczer Robot appears, destroying the aliens.

Iczer-2 leaves Iczer-One, wounded and unable to fight, and tell her that she will finish her, Nagisa and Iczer Robot at the same time, with the help of Sepia and her other self, the Iczer Sigma robot !

Iczer-One and Nagisa, aboard Iczer Robot, prepare themselve to engage Iczer-2 and Sepia aboard Iczer Sigma but Iczer-One's wound make her suffer and affect also Iczer Robot as it's a part of her.