A long time ago an all out war between the demons who lived on demonic realm and stars who are also referred as gods who lived on the divine realm broke out, the living realm was chosen to be the battlefield for these beings to fight. Whole living realm was turned into a wasteland, then to bring back peace and balance between these realms a mysterious force named starfield system was created. 

But, the people of living realm feared that another war might break again, so they learned to use magic and special skills which were gained thanks to the starfield system.

But as the time passed, instead of just protecting themselves people started to use them to fight each other, more refined magical techniques and weapon styles were developed to fight efficiently.

People of living realm started gathering in groups to protect themselves and formed clans. They soon evolved into various empires, kingdoms and organisations. 

In the east of the living realm, covered by deep forests was the human empire of theia. It was one of the 16 largest forces that ruled over the living realm. 

In a forest far from any of the towns of theia, a boy who looked to be in his teens was running for his life. 

"UGH!"

The boy was exhausted from running this far, he seemed to be beaten severely before he escaped.

"Why are they all after a weak teen who has not even properly learned to use skills yet?"

The boy spat as he saw an army of thousands of demons, they were after the boy's life. 

He had run so hard for last couple of hours that he could not even walk a step anymore. 

"I guess this is it for me. I can neither run from them nor fight an army this large."

One of high ranking demon came forward and said,"You did well running from us despite being a child, but this is it for you."

Boy was unable to move and almost fell unconscious. 

'What should I do?... I cannot just die... Not like this.'

"why do you want to kill me?"

"It is because of the orders from one of the 72 demon kings, 'Paimon'. The magic you possess, and your own existence is dangerous for us."

'damn those demon kings, if this is my end I will not go without a fight!'

The boy tried to use his magic.

"So you want to try and resist us? I will not allow you to use any magic" he quickly stopped the boy from using it. It seemed like the demon was frightened by his instincts because of that magic. 

"I will personally make sure that you don't use that magic of yours by erasing every last bit of your memories."

The demon then activates a high level magical spell towards the boy's head. 

"Arghh, it-it hurts... stop you demonic being! I will make sure that all of you demons and gods are punished for the evil deeds of yours. I will aveng-" he stops talking because of the demonic magic. It seemed like his memories were starting to fade away. 

"Now that you won't be able to use any magic or skills, killing you will be easy."

Just as the high ranking demon was about to kills the boy, one of the demon's in the army shouted in fear,"W-who.. Who is there!!??.. general something very powerfu-" His head was sliced by a sword. 

within the moments hundreds of demons were killed by some mysterious magic. 

"Who's magic is this?? Whoever you are, Do you really think you will be spared by picking a fight against one of soldiers who directly serve one of 72 great demon kings." 

A man who appeared as a bright shining light was standing there, he was wielding dual swords and seemed to be using divine magic. He had long crimson red hairs and his strength seemed to be unlike anything that the general had witnessed before. 

The demon general seemed to recognise his appearance and said,"Why are you helping him?? He is an enemy of both of us, Then why is an existence like you helping this boy?? You are not supposed to be here! How can a being like you descend on living realm as a-" The man cut the head of demon general before he could finish the sentence.

"This boy is important for the future of all of the realms. It is not the time for him to die yet."

soon he killed every last one of the demons in that area and took the boy to a hut inside the forest. 

He used healing magic on the boy and said,"Though I cannot get all of your memories back because I do not have a lot of time here, I will heal you from the wounds you have gotten and restore the basic memories and the knowledge. It should be enough for you to remember your home and perform basic magic."

The boy was half unconscious and asked him,"Who am I?? and why did you save me?"

"I cannot tell you why I saved you, and regarding your identity, your name is Ryujin. What starfield system shows is your identity, and when the time comes you will know about it yourself."

Ryujin fell asleep and the man who helped him vanished after healing him. 

- Then the scene moves towards the demonic realm. 

A high ranking demon general was walking towards a demon. He bowed down and said,

"Demon king paimon, we were unable to kill that boy."

Paimon replies,"It is fine, he has lost every last one of his memories. He is nothing more than an insect now, you should be worried about the upcoming war more than that."

"forgive me my lord." he walks away from the demon king. 

"This will be interesting, I did not expect him to help the boy." Demon king paimon seemed excited and left the scene.