It is the year 1997, and aliens have taken over most of Eurasia.  Humanity fights back with giant robots called TSFs, but is gradually losing ground to endless alien armies.  Now the aliens are advancing on Japan, and Yui Takamura, a trainee at the Imperial Guard Academy, will have to battle them...
When did the cute young lady I knew 
grow up to be such a splendid soldier?
Sin darme cuenta, aquella niña bonita se 
ha convertido en toda una soldado imperial.
Sin darme cuenta, aquella niña bonita se 
ha convertido en toda una soldado imperial.
Quando é que a bela princesinha que eu conhecia se tornou uma militar tão maravilhosa?