Atsushi Nakajima and Kyouka Izumi it seems that both of them find themselves in another world where they are in continent called Valentina where the two kingdoms are on the brink of war. Separate from each other, Atsushi meets Alm the leader of the group called The Deliverance and Kyouka meets a princess of Zofia Celica. Now they both are intended to find each other  has they will be in the fight for their lives.

Atsushi x Kyouka
Alm x Celica