Kazuya Souma’s (From Genjitsushugisha no Oukokukaizouki Manga) grandparent left him with the request that Kazuya should start his own family and defend it with everything he has. Kazuya swears to uphold that want till he’s summoned to a different world as a hero.
During this world, the countries are being ravaged by the demon world, with monsters running out and assaultive the land. Numerous war efforts and a rise in refugees have sent the dominion into disarray.
However Kazuya manages to stay calm and propose solutions to things with the king. From this demonstration in ability, the king decides handy his throne to Kazuya and have him marry his daughter!
This can be Kazuya’s story in making an attempt to revive a kingdom from another world.
