Storming the Demon King’s castle, the warrior called Hero discovers the King is actually a young pretty woman with an unusual proposal. If the 15-year war ends, both sides will suffer as with no common enemy the winning side’s factions will fight a civil war, but she has a plan to end the war, bring democracy, advance knowledge to humanity, and ensure lasting prosperity for both sides no matter who wins. She just needs a human collaborator, and Hero accepts becoming her trusted partner While working together, mutual attractions will develop.