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.
But we of the Horn Clan...
Aber wir vom Horn-Clan …
Pero el Cuerno…
Pero el Cuerno…
Mais des Cornes comme nous…
Ma noi siamo il Clan del Corno...
Mas nós Chifres...
Но Клан Рога...