Earth is the 13th episode of the Bokurano anime. It features the end of the battle of Maki Ano and the choosing of Yōsuke Kirie as the next pilot of Zearth.
In this episode we learn that there are parallel earths being championed by Zearth's adversaries, and Maki learns for certain that they are piloted by human beings of their own.
This is Zearth's eighth fight against other robots during the timeframe of the series.
Anime Episodes, in order
Game | Zearth | Secret | Strength | Weakness | Lust | Scars | Vengeance | Family | Friends | Life | Related by Blood | Earth | Hesitation | Self-Destruction | Recollection | True Identity | Affection | Reality | Mother | Fate | Truth | Distance | Snowscape | Story