As Momoka, who were once a part of the same experiments as Mirei, prepares to attack, Lady Lady show up to fight against her, but find their attacks ineffective against her Soldier Arm. Momoka and her allies then kidnap Mamori, learning of the potential within her and deciding to keep her to herself. Meanwhile, Mamori recalls when she was in the same organization as Momoka, having been exiled after refusing to kill others and later sent to Mermaid due to possessing the Armed Virus. Blaming Mirei for everything bad that happened for her, Momoka prepares to use Mamori's body for her own gains. Mirei, joined by Lady Lady, head to Veste to rescue Mamori and the other captives, fighting her way past Charlotte before confronting Momoka, who plans to use Mamori's own form against her.
