Karutsu no Madoujou Tactics

Long ago, on a distant continent, there was a small kingdom caught between powerful nations, a fragile realm struggling to survive.

The previous king had spent his life engaging in delicate diplomacy to keep the country safe. But after passing away from an unexpected illness, he left behind only his young and inexperienced heir, Prince Hauro.

Sensing weakness, the neighboring nations marched in without hesitation, swallowing the castle town and its surroundings almost overnight.

Then, on a fateful day, Hauro performed a forbidden ritual and summoned the Flame Demon Calthufer. The spirit spoke to him:

“Swear yourself to me, and vow to burn this entire continent to the ground.
Do so, and I shall bestow upon you the power to topple enemy fortresses and lay their lands in ruin.”

[Translated from official website]