Prologue: An Immortal will always been an Immortal
In the darkness world there's seems to be a person. Although the world is painted with blackness the person's body is glittering with lights, no, more likely its a spirit.
'W-What is this!?' The spirit opened its eyes, what showing in its eyes is confusion, life and anger.
'I died didn't I? But what is this suppose to mean? I'm back to this void world!? What the f** do you still want with me!? The spirit scream like a mad man while clutching his fist tight. If its a physical body maybe his nails are now digging deep to his palm.
'Bastard! Who might you be get the hell out of here!! Why the F** I'm here!? Why!? I've live my life for thousand of years! Meeting new people loving them and seeing them died in front of me!' The spirit continue its scream at first its an angry words but little by little its angry scream turn to sorrow and pleading words. "just let me rest already! Just what's the use of me dying if I'm still going to be here!? Please let me rest!!!!'
Just as you guess. This person is the Immortal Nex, Nex Serus. No need to explain who he is. As we all see his life, hardship, pain, etc and etc. We even know what plot he did just so he can die.
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"What a nostalgia to be here again"
After for who knows how long. Nex at last calm down.
'Am I going to be reincarnated again? This blackness is the same as it did back there. This pure blank space!'
This place is the same place he saw when Nex opened his eyes after he died at his first world. So being here he by no means doesn't know the meaning behind this place.
This Place is like a road to your next life. So being here means that you will be reincarnated.
Nex who is floating here and there for who knows how long. Suddenly his eyes lit.
"Looks like the time for me to reincarnate is here." What he saw is a hole of light. This light is leading to who knows where. But Nex is sure that. No matter where it leads the outcome is the same: New Life.
"If I somehow turn to baby again then my only choice is the path of normal person. I no longer seek the immortality. After all what's the use of immortality if my loved ones are mortals?" nex who got immortality in his life already knows the pain of being immortal to the point that he will commit everything just to die, and so he did.
He got nearer and nearer to the light and then
*Poof*
His vision blank out.