Yuuto's been sent to another world, where he is now commander, or "Patriarch" of a clan of warriors.  To survive in this new world, he uses his cell phone, his only connection to the girl he loves back home.
That's right. You did come back, didn't you?
Stimmt ja, du bist wieder zurück.
Es cierto, volviste, ¿no?
Es cierto, volviste, ¿no?
Tu étais de retour, c’est vrai…
Già. Alla fine sei tornato, vero?
É mesmo, né? Você voltou, não foi?
Точно. Ты всё-таки вернулся.