In the calm of darkness where the light was slowly fading.

"What is it?" a faint voice was heard from the darkness of the void.

"My memories, my life is coming back upon my death, "The voice continued with a feeling of sorrow in his tone.

"Earth huh? I never thought I would remember my memories on earth on this deathbed. It's beautiful, my ignorance, my youth, and my mortality.

"Ah so beautiful, I never thought that I am a socially awkward person huh, had trouble with connecting with friends, family, and even to girls that I am even scared to look at them in the eye...

"No goals in life and confusion of what to do, but now I am full of regret and hatred. I even have to..."

Suddenly he can hear a faint voice calling.

"Young master! Young master! Wake up! Wake up! Wake up!"

He noticed there was cute lolita on the side who was constantly calling him while puffing. After a moment, she noticed that the young master she was calling was still not waking up, so she repeated-.

"Young master! Young master! Wake up! Wake up! Wake up!"

The young man on the bed abruptly opened his eyes, looking dazed.

"Young master, this is the day you will have to tame your beast and ceremony to become a Symbiotic Beast cultivator! If you're late you won't get a chance anymore!" The little loli maid said.

The young man with a handsome immortal-like face and long black hair still acted like he didn't hear the little girl. He was staring at his hands full of youth, thinking, 'I see, I came back three thousand and four hundred years ago. Back when I am eighteen years old in this Plane, ' then the young man looks at his memory and saw a transparent figure.

He close his eyes with tears on them, 'I suffered, regretted a lot, and gave up something important to me. I swear on this life, I will do everything I want and correct all my wrongdoings!!'

The little girl noticed that there's something wrong with her young master thinking that her young master is happy for he's been waiting for this day to come, and she was about to shout once again in her little voice. However, the young man turned his face to her and says,

"Thank you for waking me up."

Then he got up and took clothing to wear and said on his mind, 'I need to be there fast or I would miss it again!' The man said as he patted the little girl gently and swiftly moves with haste, leaving the little girl dumbfounded.

The young master's name is Remy!

Remy is a beginner game developer from planet earth and he became a game developer so he could use cheat in many games he wanted to play. But he died because of that.

When he was practicing on creating a ROM-HACK monster game. Remy put a cheat on his self-developed bat beast.

However, because of the extreme happiness, he felt... Remy died from a heart attack.

Later he reincarnated with his past life memories intact to a Plane land that is called the Main Plane: a flat Land with no limit in different directions! And is full of monstrous beings like pocket monsters that Remy knew but some of them were undescribable that he cannot comprehend.

While on his way, Remy observes his surroundings and couldn't help but mutter, "So, I am back and those things that I forgot slowly being remembered. The sacrifice had paid off although." he couldn't continue as he could only sigh with deep sadness.

'This is my second life on this plane. In my first life in this fantasy world, I have no control over my life. Everyone was always telling me what to do, and I made a lot of mistakes from the past.

'Women, friends, and the people I trusted used him for their gain and then abandoned me when I am not needed. Only some helped and some even sacrificed themselves to me.

'I will always remember you all!

'I became so naive because I am from the earth and because of that, I am always taken advantage of, and sometimes I even experienced life and death situations for them.

'That's why I am bitter.

'Finally, after scheming for a very long time, I gained something important and added a technique I learned from the lower worlds of this symbiotic universe, I, Remy, succeeded.'

Looking at himself, his mortal hands he sighs,

"I am not so used to being a mortal, I'm so alienated with this mortal body. I need to become a cultivator fast. However, there are still memories left." he said with a determined look.

There is a profession on this plane called Symbiotic beast Cultivator. Symbiotic Beast cultivators can transform into two transformations of their symbiosis chosen beast; they can become a kaiju like Godzilla.

They could also turn into a humanoid monster called symbiosis final form by merging with spiritual symbiosis beasts and becoming a being with the features of a human; two feet and an arm.

However,

Symbiotic Beast cultivators in this world would be crushed to death by the world's aura if they didn't improve their cultivation stage in time.

For them to improve their cultivation stage. Symbiotic Beast cultivators would have to go to different worlds/dimensions/Timeline using soul stones they gathered, and once they are back; The main Universe/Plane will take half of the stage levels of cultivations they accumulated in those diverse worlds/dimensions.

A Multiverse.

"Now, I am back."

He said with a smile that was uncharacteristic of him.

"I never thought that I would also remember my earth life memories. Interesting," he said with a light smile.

Looking at his surrounding, Remy thought of this universe.

'In this symbiotic universe, monsters are like my pocket games and there are also super effective and not super effective to them that will only apply on those monsters like in my game, but only when Spiritual beast cultivators transform into a symbiosis beast and full symbiosis form!

'When I first read it for the first time, I was really surprised.

'There are two kinds of transformation of symbiotic cultivator here that I can compare to anime I love that I just remembered.

'First is the Sage Beast symbiosis.

'It works like sage mode from ninja-like something I used to watch on earth. With rules of the monster game of super effective and not very effective.

'The second is the Full symbiosis...

'That works like a logia fruit power from another series I used to watch with a wonder guard ability from the monster game. Where a user's body will become an elemental and can only be hurt by super effective attacks.

'If the foe doesn't have an attack that is super effective against it then, the only outcome is to be defeated and worse is the only outcome is death.

'The concept of whatever elements beats the other as long as the user has more power, won't work anymore.

'That is how terrifying a Spiritual symbiosis beast in this Plane is. that's why I need to cultivate fast.'

"Master Remy!" A voice suddenly rang out and was heard stopping the thought of Remy.

"Oh, it's you! Crastecian! I apologize for the trouble... I am late, but I'm ready to become a Symbiotic Beast cultivator now." Remy said while panting from the run earlier. 'This guy, '

"Symbiotic Cultivator, " Remy said softly in the air.

'Why do I want to become a Symbiotic Beast cultivator?

'Symbiotic Beast cultivators cannot just transform into their beast and humanoid beast form, they are so powerful that they cannot die instantly, just like Spiritual symbiosis Beasts, as long as Symbiotic Beast cultivators have an aura on them-

'They will just regenerate much to my liking.

'Why?

'Because auras inside spiritual symbiotic beasts are created from the so-called Pure and Natural energies.

'Natural energy (or Nature Energy) is energy that exists in the atmosphere and the earth. In the Ninja Shippuden Anime world that Remy knew in the past, by gathering the natural energy in their surroundings and combining it with their chakra, sages can enter Sage Mode and use senjutsu.

'But the regeneration was slow, especially when in a lower stage of cultivation. A broken arm takes about an hour to heal so in a fight once someone was frozen or paralyzed, they could be attacked again making their regeneration useless anyway.

'In the series, I could remember, humans have chakras on them. They are born with chakra because they are exposed to a high amount of natural energies that made them mutate.

'Chakra is their adaptation that can connect to natural energies.

'However, humans here in the Symbiotic universe plane didn't have chakra like in the anime Remy knew. Taming a spiritual symbiosis beast and becoming one with them is the only way for them to control the so-called Natural Energies. Because when they are one, they can transform into their chosen beast, which is loved by the plane's aura itself.

'They can perform a lot of stunts where a Symbiotic beast cultivator can produce laser beams on their mouth and destroy an island in a single punch! That's why I need it!

'And the series that I could remember is just an example of one of the smaller/weaker worlds or dimensions connected to this so-called Symbiotic Universe or Main Plane of existence.'

"It's not much trouble, master Remy, I hope you become a Symbiotic Beast cultivator and transform into a giant monster and kill those system users!" The attendant named crastecian cheered, 'Why does it feel young master is melancholic today?'

"Yes."

Remy only replied with a smile, then he entered the building where the clan's younger generation, like him, would tame a beast.

A little while later.

"Wait on the side." A towering man said to Remy.

Remy obediently did as a man told him to. Remy knew they were just one of the wealthy families inside the clan. Symbiotic Beast cultivators the real rulers like this man, so he should not be arrogant.

An hour later...

"NEEEEXXXTTT!!!"

Remy woke up because of that voice. 'Finally, it's my turn to tame a beautiful beast!'