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?
For a few hundred thousand 
people to escape into space,
،أن يهرب بضعة آلاف شخص إلى الفضاء
Dass einige hunderttausend Menschen
in den Weltraum fliehen können,
¿Que unos cuantos miles
escapen al espacio
¿Que unos cuantos miles
escapen al espacio
Évacuer 100 000 personnes
dans l’espace,
Qualche centinaio di migliaia di persone 
scapperanno nello spazio,
Que algumas centenas de milhares
escapem para o espaço,
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