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?
It should be easy enough, if you were 
able to think about something else.
.سيكون أمرًا سهلًا إن تمكّنت من التفكير في شيءٍ آخر
Du konntest doch gerade auch an was anderes
denken, also wird das wohl kein Problem sein!
Ha de ser fácil si tienes tiempo
para soñar despierto.
Ha de ser fácil si tienes tiempo
para soñar despierto.
Si tu as le temps de rêvasser,
tu devrais y arriver, non ?
Doveva essere semplice, 
se hai avuto modo di distrarti.
Se tem tanto tempo para ficar
distraído, deve ser fácil.
Если есть время ворон считать,
 тебе это раз плюнуть.