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?
Then act like the genius 
you are, and do something!
!تصرفي كعبقرية وافعلي شيئًا ما
Also handle wie ein Genie
und tue etwas!
¡Compórtese como el genio que es
y haga algo, por favor!
¡Compórtese como el genio que es
y haga algo, por favor!
Alors, agissez comme le génie
que vous êtes !
Allora tiri fuori tutto il suo genio
e faccia qualcosa!
Então aja como o gênio que é
e faça alguma coisa!
Вы же гений! Вот и исправьте это!