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?
This is Cadet Shirogane Takeru, 
who's just been assigned to the 207th.
.هذا هو الطالب شيروغاني تاكيرو الذي تمّ تعيينه مؤخرًا لقسم 207
Das ist Kadett Shirogane Takeru,
der soeben der 207. zugeteilt wurde.
Este es el cadete Takeru Shirogane,
acaba de ser asignado a su clase.
Este es el cadete Takeru Shirogane,
acaba de ser asignado a la clase.
Voici le cadet Takeru Shirogane,
tout juste affecté au peloton 207.
Questo è il cadetto Shirogane Takeru, 
che è stato appena assegnato alla 207ª.
Este é o Cadete Shirogane Takeru,
que acaba de ser designado para o 207º.
Кадет Такэру Сироганэ недавно
 был приписан к 207-ому взводу.