[GundamZZ]

That's a good question, and no one bothers to clarify it. The connection between Total Eclipse and the main story is near non-existence. I still think the first two episodes is the best of the series. First, we only know Yui and classmates are from military families. They are trained to join the private army of Shogun's sister. It may connect to the characters in the main story. Second, Yui is saved before Beta almost chewed her. Takeru comes down and swings blade around. If we have time, we can research about this event in the story of Alternative.