Shirogane Takeru found himself inexplicably transported to a world that resembled his own in many ways, with one major difference: For nearly 30 years, mankind has been at war with the alien BETA, who have succeeded at wiping out over half of humanity and had nearly captured the entire Eurasian continent. As Takeru tried to come to grips with this bizarre new reality, he realized too late that the majority of humanity will be abandoned with the Earth, as the chosen few escape to the stars, hoping to find sanctuary.

Now, equally inexplicable reasons, he finds himself returned to the first day of his time in this alternate world. Will the experiences and knowledge he has gained allow him to make a difference?
As a cadet, there's a limit to how 
much trust I can expect from you,
،كطالب عسكري، هنالك حدود لمدى ثقتي بك
Als Kadett kann ich nicht
so viel Vertrauen von dir erwarten
Como cadete, no hay mucho
que pueda esperar de mí.
Como cadete, no hay mucho
que pueda esperar de mí.
En tant que cadet,
je ne peux guère vous aider,
Da cadetto, c'è un limite alla fiducia 
che posso ottenere da lei,
Como cadete, há pouco que posso
oferecer para você me reconhecer
Кадет не получит ваше уважение и 
не сможет помочь в исполнении плана.