Quicker than ever, 5 years passed and the infant grew older. For a human raised in a demon realm, he had a pretty happy childhood. Well, it was joyful, but after a certain incident, the young prince didn't have any time left for joy and fun.

Flashback

It was a rather normal day for Rin. He scoured around the enormous castle, discovering rooms he had never seen before, and most important hiding from his babysitter, a humanoid demon belonging to Iblis, the Demon King of Fire. Rin entered the courtyard he loved to play in.

The dark stone made up everything in this castle, from the floors to the walls. It was taken over by vividly colored vegetation and withering trees. A few little green demons were jumping through the garden. Rin always forgot what they were called, but he knew, that they belonged to his big brother Amaimon. Quickly he followed the goblins and tried to catch them. "Wait! I want to play with you!" the kid shouted running after the small , he felt a firm grip lifting him off the ground and turning him around.

"What are you doing, Little Brother?" A certain monotonous voice inquired. "Amai-nii-chan!" The boy wailed smiling at his older brother.

"I told you not to call me that. My name is Am-ai-mon." He spelled out suspending the miniature human with his arm.

"They won't stop running away! I just wanted to play with them!" Rin complained attempting to swat Amaimon's jabbing fingers.

"Oh! So you want to have fun? Too bad, I can't play with you. You are far too small and far too," He paused searching for the correct words, "Human."
"Father would try to kill me, if I hurt you" The demon thought out loud, scratching his head as he spoke.

"I'm not too small! Really! Please play with me, Big Brother!" The boys eyes shone in excitement.

"Well, okay then." Amaimon said in his typical carefree manner. The young Prince cheered and looked at his brother enthusiastically. He had never played with one of his older brothers before, because they weren't around very often.. He didn't know that Amaimon had a more rough game in mind.

"Prince Rin? Where are you?" Cysat ran throughout the castle looking for the little human he was supposed to watching. It wasn't the first time that the boy had escaped his babysitter's sight.

Until now, the fire demon managed to keep the young Prince's disappearances a secret from Lord Satan, and he would really like to keep it that way. The good thing was, that Rin always came back unharmed; otherwise, Cysat would have been executed by now.

Panic rose in the demon, it had never taken him that long to find the Prince.

Right at the moment when the fire demon wanted to turn back, looking if the boy had returned by himself to his chamber, he heard a loud scream.

Immediately, Cysat ran towards the scream had come from. When he stepped into the courtyard, all he saw was Lord Amaimon in a tree holding the Young Prince by his legs. "Isn't this fun? I'm amusing myself quite a bit." Amaimon deadpanned.

"Please let me down! I'm scared!" Rin screamed out, small tears formed in the corner of his eyes. "Well then," the King of Earth let him slip down a bit, but before he could grab him again, a burst of blue flames came from the Young Prince. They ebbed down as fast as they had burst. Amaimon let go of Rin afraid to be burned. He was absolutely flabbergasted, he did not expect that to happen.

"Young Prince!" Cysat shouted, running towards the Prince who was rapidly falling towards the hard ground.

'If something happens to him, I'm so dead...' He managed to catch the Human Prince last minute preventing most of the damage from impact.

He looked at the raven haired boy, only a few scratches could be seen at his legs and arms. He was unconscious, but not from the fall; it seemed like the sudden outburst of the flames had used up all energy the he had.

Amaimon landed next to them. "I thought he couldn't use father's flames yet. I wonder if father knows. . ." Amaimon didn't seem to care that he almost killed the sole heir of the Gehenna's throne.

A few hours later, Rin was as good as new. Someone had taken care of his wounds and he was awake again. He was still a little tired, but that didn't really matter to his father.

Rin was brought to the throne room by Cysat who was shaking terrified of punishment for losing the Prince. The fire demon kneeled down in front of the god of Gehenna, but Rin just ran towards the demon that scared even the most vicious monsters.

"Father!"He smiled. He would have climbed up the throne to sit on his father's lap, but he was stopped by the hand of the demon god.

"Rin, is it true what your brother told me? Were you able to summon the royal flames?" Satan asked as friendly as it was possible for him. Rin didn't notice, but Cysat heard a dangerous tone in his voice. The Young Prince nodded eagerly.

"Show them to me." Satan commanded.

Another few hours later, Rin sat on the ground in front of Satan. His face was contorted, his eyes reflected his determination as sweat dripped down his face. Unfortunately, not the slightest spark of fire appeared.

"The seal is stronger than I thought," He pondered.

"You, Cysat... that's your name, right? You were there when it happened. Explain the circumstances of his awakening." Ordered Satan, glaring at the servant.

"Of course, Lord Satan. The young prince was playing with Lord Amaimon when he" He paused, feeling Amaimon's glare in his back. "When he fell into a hole that was digged by some goblins. I guess the Young Prince was scared, that is when the royal flames showed themselves."

Cysat didn't dare speaking the truth and blaming Amaimon for Rin's bruises.
He knew while the Lord Satan was terrifying when mad, his son could be just as menacing. No one wants a Demon King against them. He knew that this would mean certain death for him to say, and the Lord Satan might not even believe him.

"Hiis flames work as a defense-mechanism by reacting to his emotions." Satan concluded.

"We need that cursed sword, so I can free my son from his bindings. . . From now on, Rin will be trained, so he can go to Assiah and claim the Kurikara."

After that day, Rin's childhood was over. He trained every day for the following 10 years. At first it was hard for the child, but it became simply a daily routine. Standing up early, training, learning about Gehenna and Assiah etc.

After 10 years passing, Satan finally considered his son ready to steal Kurikara.

Hey! Thank you Ichika Aono for telling me, that there was something wrong with the chapter when I first uploaded it. I hope, I fixed the problem.