For 15 years, a war has raged between the humans and demons. The human's greatest warrior, Hero, heads to the castle of the Demon King, leader of the demons to end the war. To his surprise, the "Demon King" is in fact a woman and she has been waiting to meet Hero in person and wishes to talk with him instead. As they talk, she reveals the war has actually benefited both sides as their races have put aside their differences to fight against a common enemy and improved the economy. However, it has allowed the powerful and corrupt to abuse the weak particularly how the poorer Human Southern kingdoms must continue fighting the demons in exchange for food and financial aid from the rich Central kingdoms. Furthermore, no matter which side wins or if the war suddenly ends without compensating those employed because of the war, it will lead to a massive civil war much to Hero's horror. But the Demon King has a plan to bring prosperity and a lasting peace for both their races and wants his help. Convinced, Hero agrees where both of them pledge their lives to each other.
一軍にも匹敵する強大な戦闘能力を持つ勇者は、人間の敵として立ちはだかる魔族の長である魔王討伐の為、単身で魔界の奥深くへと乗り込む。
しかし、魔王の城に到達した勇者の前に姿を現した魔王は、美しい人間の女性の姿だった。
戸惑いつつも果敢に戦いを挑もうとする勇者だったが、魔王はそれを受け流すかのように、とある説明を始める。どちらがこの戦争に勝利したとしても、その先に平和は訪れないのだと…。
홀로 마왕성으로 향한 용사는 드디어 마왕과 대면하게 된다.
15년에 걸친 인간과 마족간의 전쟁을 끝내기 위해 용사는 마왕에게 칼을 들이대는데...
Durante 15 años, se libró una guerra entre los humanos y los demonios. El guerrero más grande del ser humano, Hero, se dirige al castillo del Rey Demonio, líder de los demonios para terminar la guerra. Para su sorpresa, el "Rey Demonio" es de hecho una mujer y ha estado esperando conocer a Hero en persona y desea hablar con él.
