Thirty years have pass since the demons came to live amongst us. Their world was destroyed by countless wars. One war after another. It took a toll on them and their world. A powerful death mist took over their world and kill every demon it touches.

It's started with a new Demon King that came into power. He wanted to untie all the demons as one kingdom. The battles were in tense. Each clan fought among themselves, until the last two clans were standing. These two clans continue for years. Then one day, a mistake was made. The two kings' clash on the hill for all to see. One young king against an older king. 

The two encircle on each other, fighting with all their might. Not to give any levy to an opening, but who know that the young king intellect in battle prowess. The old king was having a tough time. It took everything he had to try and defend himself against the young king. Until he made a mistake, one move to the right side. The young king saw this and took this chance to make his move. Stabbing the old king in the heart.

The old king eyes widen. The pain explodes from his chest. Looking down to the sword from the young king. He knew that he will not survive. The removal of the sword, the young king back away from the old king.

"So, this is what the last battle came to be. I just wanted to unite the clans together. I destroy our world with my selfless. Not only our world, but the clans too. Please forgive me. I did not wish for this, but you kings did not wish to listen to me." The old king fell to his knees. 

"No, I was not there to see you or listen to your words. That was my father at the time. I only came to be king just last month. My father dies on the battlefield by your sword." The old king laughs. He realizes that the young will always come to take the place of the old. He laugh of until his last breath.

Standing on the hill. The last of the Demon Kings. Looking at the battlefield. Putting his sword away, he hands on his hips. Glance around taking in the bodies of both side of the fallen. 

His handsome face gave a somber look to his clan men. His red eyes so deep with sadness. Watching his clan men buried the bodies of their clan men. The family of the men and women of the fallen crying fill the field. This is the last stand where his clan members died. 

To protect his castle and all its people. He came out here to finish this fight. He didn't know if this was the last of the demon clans. He didn't care. He only cares for his clan members. He returns to his castle and prepares for them to leave. This world was not a place where they can live in any more.

With all the wars, they became the strongest among all demon clans. They had to leave the demon world, if not they would end up just like the rest of the demon clans. Dead as a door nail. The Demon King and his elite demon knights cast a gate, a dimension gate. Where it went to, he did not care, at long as it was safe. If they did not leave soon, they would start to get sick from the death aura.

It was not easy to cast this gate. It took all the magic they had to do it. The whole world was covered in the death aura was call miasma. They only had an hour to leave. If not, they would all die. They shield they put up was not going to last long. Every day the miasma got stronger and the shield weaken. It was only a matter of time before they to came to death. In hoping that the new world that they end up in will be afar better place than this place.

For now, they will come back one day and reclaim their home world in ten thousand years, maybe more. Stepping through the red dimension gate was a new beginning for them. No more wars, no more fighting. With a wave of a heavy heart. The demon king can only hope for the best for his people. He may give in to the pain and suffering that will come his way to pave way to his people. Once they step through the gate, their world will change.

On the other side of the gate. The demons looked around this world was different. Blue sky, green land with blue water. Not only that be there are humans in this world. Who can imagine a world with nothing but humans. The Demon King read about humans, but this is the first time a demon has seem a human in thousands of years. This world can be their if they wish it, but the Demon King wish for peace. 

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A red gate appears. Mankind went into chaos. Humans on this planet have never seen kind of pandemonium. Some humans have only read these in books. What will come through the gate. These humans fear the end of the world. Then demons appeared. Not one, not ten demons, but five hundred demons. Walk out of the gate. Humans have not seen demon more than a hundred thousand years. The humans were frightened to see them. The whole world armies gather together to face them. 

Waiting to greet them as an army of the world of humans. The Generals of the Army looked at the demons. There was one General that was not a fear to fight the demons. He was man of few words. He was more of a man of action. His looks of a handsome man of thirty some years old. With brown wavy hair and deep ocean blue eyes. His confidence come to being a young general. Not years of experience but hard work in it.

He had seen a lot on the battlefield. To his surprise, he was expecting a battle, but all the demons that came from the gate were men, women, children and the elderly. Family of demons? He can tell that if the demons wanted to fight, there was no way the Armies couldn't win. Those demons had more or less fought to the death. Not just the men, but the entire population of will fight.

They looked at the general. They had no fear of him or the armies. They were tired and hungry. The Demons King step out to greet the General. He explained why they were here, and they couldn't go back. So, the general relay the messaged to the leaders.

Mankind leaders got together and made decision the let them stay. It took a whole week for the decision. On the condition they live in peace with the humans. After that day, the demons and humans change their fate. The peace was far in the future. The first year was not looking too good for both races. It took ten years for the two to come to an agreement for the races to live in harmony. Each year the demon king changes the agreement to unjust for both races. Not just for peace but to keep the humans and the demons from killing each other's.

The King first finds out that demons were mating with humans. They are just using them to populate the demon race. So, the first agreement, if the demon were going to mate with humans. They will have to follow the rule of mating: One, the demons will marry the human they are mating to. If the human and demon must consent to this, of they own free will. Demons didn't like this, but the Demon King told them they had no choice on this. He would punish them to his demon laws that he put out. 

He wanted the demons to reproduce their population. If a child or two were born, they'd have to stay together. Never to be with another partner until one of them dies or that one cheats on their partner. Just like the humans they were all so to love their partners. Demons are very picky, and they can never cheat. Loyal until the end. The king put a magic spell on both parties to make sure that this agreement sticks. This happens on the first year among humans.

That same year humans and demons were treated differently. The humans treated the demon like a plague. So, the demon king asked for the second agreement was that they would have the same rights as humans. They will follow the laws just like humans and keep to them. If a demon does not follow the laws. They will face the Demon King or one of his elite demon knights. They have their own way of punishing demons to the law. The laws have to change to comply to demons.

Given that the demons had a bad reputation. The Demon King stand by on what he said. The demon race will not go against the world. He wanted peace among the humans and if the any of the demons go against, he wishes they will have to face him. 

This makes both side at ease. The demon king and his elite knights study all laws of mankind. He helps them create the laws and change them for both races. He also created a way for demons and humans to be caught in the act of breaking the laws. This changes for policemen and courts system. The demon king work for weeks in until the years came by. The world changes slowly, soon all he's hard work paid off.

The Demon King cannot have the humans give in to the demons. The demons will keep to the laws that the Demon King lays down. Demons are far more vicious and love to play with things that are weak. The Demon King wish for peace and quiet. He did not wish for another war.

Killing on both side cause a headache for the Demon King. Humans that kill demon never serve punishment at first. Until a demon kill a human. That demon was not punish. The Demon King waited until this day. To change every laws and court system to include both races to the punishment system that will make it equal to both races. There was a new way to punish those who break the law. This took five years to change all laws and punishment procedures.

Now the Demon King knows that stay with humans is a give and take. He was a Demon King for fifty years and not once have his people ever told him that they did not like what he did. He is intelligent in leadership and magic. He studied night and day to take the role of Demon King. His father was a Demon King, as his grandfather was to a Demon King. He was a fifth generation Demon King.

So he learned that give and take system was for all races and if he wanted the humans have something from the demons too.

So the third agreement to teach all humans how to use mana. The Demon King change the school system to include magic training for all. This was something the the Demon King had to go to the schools and learn what was taught. He even tried to find out went is the earliest to teach a human child magic. The first school was not in elementary school but a teaching school. He taught teachers magic. Three types of magic. Basic magic, advanced magic, and intermediate magic.

Basic magic was taught to elementary schools. Advanced magic was taught in middle schools. Intermediate magic was taught in high schools. Anything beyond that was taught by the Demon King or his elite demon knights. He even taught adults magic. The Demon King considered humans apart of his kingdom. Therefore he wanted them to be equal in everything and everyone. Every now and than he will talk about the two races as one. His people now include humans in them. He worked hard for both races. Sometime he will for go sleep over the love for races. For the peace and harmony that will come one day.

These are the most important agreements to the Demon King. There were others, but the Demon King considered them not so important to him. It was hard for the humans to give in to Demon King agreements. If not, the Demon King would destroy all of mankind. And define it to his image of a perfect kingdom.

There was only one thing the Demon King loved to do, and this was said by his elite demon knights. "He loved to destroy anything and anyone that get in his way." He was holding back his destruction ways. Humans were here first, but the king would get rid of them if need be. The two races lived in harmony, up until now.

What shocked the world. Is the day that the Demon King decided to take a human woman for his bride. For demons knew that the Demon King would never take a mate until he was sure she or he was the one. And the other was his life span. The Demon King is immortal. He fear that he will out live his mate. He was heartless to himself. Never to love another. He once had a lover and that person die in his arms. He refuses to take on another lover.

As for the humans knew that the Demon King never considered a marriage or take a mate with a human. For one the Demon King was stubborn. The Demon King's elite discussed this with him for years. They tried many different demons, but the King chased them off.

The King would have his sword beside him for a warning. Once he found out a demon in his bed, he hanged the demon upside down. Another time they tied the King to the bed while he was drug. He then destroyed the bed and beat the demon to death. He went on a rampage throughout the castle.

What made him change his mind? Why is he changing his way of life? Did he meet a woman? How did she catch his eyes? Did he have a change of heart?