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.
In Yggdrasil, all the people 
in a clan make an oath with
In Yggdrasil legen alle
Clan-Mitglieder einen Eid
En Yggdrasil, todos los que están
en un clan hacen un juramento
En Yggdrasil, todos los que están
en un clan hacen un juramento
Les membres des clans d’Yggdrasil
boivent une coupe
A Yggdrasil, tutte le persone 
 possono fare un giuramento sul calice
Em Yggdrasil, todas os membros
de um clã fazem um juramento
В Иггдрасиле все члены клана дают клятву