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?
Would it be different if we were regulars?!
!هل سيكون الأمر مختلفًا لو كنا في رتبة مختلفة؟
Wäre es denn anders, wenn wir zu den
regulären Truppen gehörten?!
¿Y podría hacerlo si fuéramos soldados?
¿Y podría hacerlo si fuéramos soldados?
Ça aurait été différent,
si on avait été des soldats réguliers ?
Sarebbe diverso se fossimo soldati effettivi?!
Está dizendo que seria diferente
se fôssemos soldados oficiais?
Было бы положено, если бы
 мы уже были солдатами?