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 security pass will get 
you as far as my office.
.هذا الجواز الأمني سيوصلك حتى مكتبي
Dieser Sicherheitsausweis
bringt dich in mein Büro.
Este pase te dejará entrar
 hasta mi oficina.
Este pase te dejará entrar
hasta mi oficina.
Voici ton passe de sécurité.
Questo security pass ti permetterà di arrivare 
fino al mio ufficio.
Este passe de segurança
permite chegar ao escritório.
Это пропуск до моего кабинета.