Amate Yuzuriha, a high-school girl living in the Izuma colony, meets a female courier named Nyaan.

Upon learning of Annqi's plan, Machu devises a plan with Nyaan to use the Clan Battle as a means to help Shuji escape. However, their opponent in the next Clan Battle turns out to be a newly built mobile armor operated by terrorists aiming to assassinate Kycilia.