Chapter 8 - Spiritual Pressure

── Meanwhile, the three sisters who was watching the scene between their father and grandmother, nodded in revelation.

「Grandma Inami didn't seem to be surprised after receiving Father's absurd amount of semen.」, said Amara.

「According to my birth mother who have became our Father's personal maid, even during when Father was just summoned, this much is already normal from him.」, said Rhian.

「It seem that Father is really special. As even the succubi said that Father's semen is more than a hundred times the amount compared to other men and the energy contained in it will give a person a more or less 1,000,000 permanent increase in their Spiritual Pressure.」, said Natasia.

In the world of Is-kai, people can get stronger by killing monsters and a 1,000,000 increase in their Spiritual Pressure would instantly make them Level 100.

A newly born child starts at Level 0 and commoners are at least Level 10 with 10,000 Spiritual Pressure. They will naturally level up due to the Mana they absorbed from the food they eat and even the air they take.

But if they want to be stronger, they need to eat a more powerful monster meat or personally kill a monster to absorb its Mana.

However, things have changed when their Father arrived.

After summoning Rei, Goddess Iris gave a Mana Circuit to him since people from Earth don't have a Mana Circuit and can't manipulate Mana, including Rei.

But after successful integrating with the Mana Circuit, thier Father suddenly released a pressure that even their Godmother Iris can't bear. Fortunately, their Father hurriedly contained his pressure.

The Goddess was stunned at the power thier Father have emanated and she now don't know how much powerful he got, except that he's now much stronger than her.

She was completely clueless on what was happening but, she ultimately presumed that it must be because of the Mana Circuit that was entrusted to her by a certain Primordial Goddess to be given to Rei.

She felt suspicious as to why their Father was given such a powerful Mana Circuit but she can't do anything about it considering who the Primordial Goddess is.

However, after observing Rei in the world Is-kai, she noticed that his Mana is twice stronger and much purer than any of the human in that world, or rather it was even superior than hers. And the pressure he released in their first meeting was actually because of his enormous Mana that was slumbering before he was given a Mana Circuit.

And this is where the change in Is-kai have started.

Before, people in Is-kai were measuring their Level according to the amount of Mana a person has. But it was changed into measuring the intensity of the pressure of their Spiritual Energy, or commonly known as Mana.

According to their Father, who have became interested in Mana and started making research on it, an Spiritual Pressure is being emitted when a person release or use thier Mana that is contained within their Soul.

And the more intense the pressure a person emits, the more firepower that person would have. But this pressure can only be felt from a high level person with high amount of Mana.

He also said they should need to purify the mana from the monsters they killed before absorbing it because it contains impurities. Although as a result the amount of mana they would be able to absorb would only be 80-50%, thier Spiritual Pressure would instead be doubled compared to other people of the same level.

Of course, the method of purifying the Mana have been kept secret by Rei's wives and it's only available for the people around Rei, making them the most powerful organization in that world.

And the matter about Rei's semen containing enormous amount of Mana have also been kept secret.

His wives only found out about it due to the succubi.

At first, the succubi were enemies. They are the only race who have formed an alliance and not became a subordinate under the Demon King due to their powerful mental attack.

If the Demon King antagonize them, although he wouldn't be affected by their mental attack, that's not the case for his subordinates. So the Demon King instead decided to form an alliance with the succubi rather than creating casualties on both sides.

And after hearing that the Hero is male, the Demon King asked the Succubi to send some from them to subdue him.

The succubi, who were sent, then attempted to lure Rei with a promise that they would buy him a candy.

And Rei being Rei, he eagerly went with them since he knew that those beautiful onee-sans won't harm him.

Although the method they used to lure Rei seemed to be usual for them who uses their womanly figure or mental attacks to charm men, they don't have a choice since their abilities didn't seem to work on Rei.

The succubi, who where sent to deal with Rei, knew that a Hero won't die so easily without a fight, so while they were waiting for the right moment to strike him decisively all at once, they took him around to buy him some sweets and anything he wanted to lower his guard.

However, they eventually became very fond of him and lose their resolve to harm Rei. They said sorry at him for having malicious intent at him and they hoped that he won't hate them.

Rei said that it's alright as he knew that onee-sans, who accompanied and took him around to buy him some treats, won't do harm to him.

The succubi became grateful but they didn't forget to warn Rei to not be too trustful. They continued to take Rei around until his wives, who were still his companions at that time, have found them.

「Fortunately, they had a change of heart and didn't harm Father.」, said Rhian.

「Yeah. And the group of succubi who were sent to deal with Father have eventually became our mothers.」, said Natasia amusedly.

「But it's also thanks to them for finding out about our Father-chan's enormous mana-filled semen.」

When Amara's mother, the head priestess at that time, asked who are they and what do they want, they said that they are succubi in human disguise and they were sent by the Demon King.

Rei, upon hearing their race which is unfamiliar for him, immediately became interested at them. So he always went to the designated compound where they were detained to ask about their race.

He found out that their race have two methods to level up, one is to kill monsters to gain its Mana and the other is to absorb Mana from male through sexual deeds.

And once in a while, because they are an all female race who have excess female essence, they suffer from an uncontrollable thirst for male essence and need to regularly absorb energy from a male.

And high level men have a huge amount of male energy.

When Rei learned about it, he unhesitatingly extended his help to them like a fine Hero and let them absorbed his energy.

The group of succubi were surprised at how pure and dense his energy is and they were overcome by thier curiosity to know if it's also the case with his semen.

Knowing how gullible Rei is, they lied to him by saying that his energy is too strong and it's making thier body hot.

Rei felt sorry for making them excited, so he immediately did everything he can to help them calm down. Then an orgy happened.

But when everything calmed down, they noticed that they couldn't absorb the energy contained in Rei's semen. Although they can sense that his semen was densely packed with energy, they could do nothing but watch as it got absord or dissipated in the air, as if the world was saying that it's only for her alone.

「I remember my mother saying how stunned she became when she saw the orgy that had happened. As someone who have only recently become exposed in sex when Father arrived, it must have been a great shock for her.」

Amara's two sisters nodded at her words. Their birth mothers have also told them about it.

The three sisters' mothers have grew up under the teachings of the church and even though they already have sex with their father, they were still conservative in doing it and won't let other people know their fetishes. So what the succubi were doing was too obscene for them and they became angry that it might influence badly on Rei.

「But due to it, we've learned that people won't be able to take advantage of Father and they need to first have their Mana Circuit modified by father to be able to absorb the densely packed energy in his semen. 」, said Rhian.

「It's also the main secret why all of us have become quickly too strong, with our mothers already over Level 500 with more than 250,000,000,000 Spiritual Pressure.」, said Natasia.

<<Author's Note: My Power Level Scaling is slightly similar to Dragon Ball while making some additionals, but I have my own computations which I spent 5 days to create by trial and error, so I hope you only criticize it nicely.>>

Hearing how much energy is being wasted because his companions and the succubi can't absorb it from his semen, Rei researched for a way to enable them to absorb it since he promised the succubi to help the other succubi who were also suffering from thirst for male essence which he called 'male essense deficiency', but more on that later.

As the three sisters was discussing and reminiscing, they suddenly heard their father scream.

「Mom!」

They hurriedly teleported to the bathroom where their father is, disregarding the fact that their grandmother might see them.

「Father! Did something happened to grandmother!?」, Amara said while the three of them immediately looked at their grandmother to see if she's alright.

They know that their Father won't let any harm happen to his mother, but they still blamed themselves for not overseeing them in this times when an apocalypse might happen anytime.

The moment their eyes landed on their grandmother who have a silly expression, they suddenly become stunned. It was Natasia who recovered first.

「Father, I think Grandma Inami is alright.」

「Re, really? But if I remember if correctly, mom didn't loss conciousness whenever we do it before….」

「That's because Father's techniques have become much better after years of doing it and it's only been a few hours for Grandma Inami.」, Natasia added.

「Then… then mom will always be like this whenever we do it? I don't want that…..」, he is worried that he might harm his mother mentally.

「You don't need to be worried, Father. This just means that you need to always do it with Grandma Inami for her to have resistance towards your skills.」

「Natasia and Amara are right, Father. If you look carefully at Grandma Inami, you can see that she have similar expression with those new girls.」

Everytime some promising girls from the church or girls, who have reached level 100 and wants to serve their father, got accepted in their association, their father will help them to level up even more faster.

「Is that how it is? I'm glad. Then I will take your advice. Thanks, min'na.」, said Rei while promising to himself to make it more pleasurable for his mother next time they do it in order to make his mother more resistant to his techniques.

「It's nothing, Father. I'm sure mother will love it now that you will be more together with each other. Right, everyone?」

Amara's two sisters nodded at her words, then Rei cleaned his mother using magic before he sent her to her bedroom to rest comfortably.