Caina the Succubus

Amy quickly stayed behind to watch the ship alone while the researchers do their own thing.

As soon as they left, she quickly teleports to Boris's island. 

The place looks extremely modern with everything powered by electricity than magic. Because electricity cannot be spotted to magic detection, it makes their locations a bit inconspicuous.

There is a magic circle. Hecate Arkyia

A variant of the Hecate circle except this one bind anyone inside it. A succubus is difficult to contain even with the binding contract. Because she is also a true demon, she will not take any chances just like that old villager chief who took advantage of her powers. 

Amy is determined to get her trust as she truly wishes to get along with her.

"Project Yerenis has made much progress but this might take at least another few years. This is multiple surgeries, and we can't guarantee it would go well if we're not careful." Boris said.

"That's why we need her consent. Nana is an important player to my plan. For Aron to be brought to the world, we need her."

The black sheet of paper with gold writing glows upon being touched by Amy as she sets it down on the now red circle.

The figure came out of the paper like black smoke, and it quickly disappear to reveal an extremely beautiful figure.

She has hazel skin, hair and eyes that screams allure to anyone who lays eyes on her. Her beauty is so out worldly that both Boris and Amy were in shock. She is practically glowing like the golden desert gave birth to her. It is comparable to a goddess born from the sea.

She is completely naked and sports an extremely voluptuous, tall and sexy figure. Lesser men would drool over her and women would fight each other just to look at her beauty as if staring at it would reward them with the same thing.

Instead of the sexy, femme fatale figure personality that Amy saw in the manga, she instead saw an embarrassed woman who realizes she is being objectified. Breaking out from this trance, she quickly grabbed her cloak and wrapped it around her thus breaking Boris out of this trance too.

Shocked, he looked away to process this. This is dangerous and that is just by looking at her. Even if a person is not sexually or romantically attracted to her, anyone who understands the concept of beauty could still be drawn in.

Aron has to have the strongest will in the world if he was able to resist this the entire time especially as he is the only one to not be taken in the first time.

"I'm sorry." Amy says in embarrassment. "I didn't mean to stare."

The woman stares at Amy in confusion.

"I promise we'll explain everything but let's get you inside and with new clothes. None of the ones I own will fit you."

After taking her inside, Amy quickly gathered some materials and using her imagination, created a wardrobe full of outfits around her size. They are conservative as they are necessary to hide her aura. Besides, it seems that she wants this more than she needs it.

"My name is Nana." she said. Even her voice is unintentionally alluring. And she revealed her name to them so early.

"We summoned you because we have a proposition for you." Amy said. Thankfully Boris is under the worm's control otherwise his perverted nature will reemerge. "My name is Amaryllis Anthos and I need your help."

"And my name is Boris Butch" he says next to Amy.

She raised a brow to this. "My help with what?"

"This must be kept a secret because other than me, only this man, Boris and another man name Alabaster knows about this."

Nana looks confused.

"I know the future or rather the major events including yours."

Nana gave them a suspicious look. "You don't look like a seer."

Amy shook her head, "I am not but you wouldn't believe me if I tell you everything. Even if I did, I would just get cut off."

Nana was confused until Amy opened her mouth to speak. She tried to say. "This world is from a fictional story." Instead, it came out as:

"*^&^*^%*%&^)_)(%*^$#$%*^%$#$#$%^&*()"

Boris and Nana were bewildered about that.

Part of her mission requires her to not be able to tell the whole truth that this world they are living in is fictional. She tried multiple times in the past to figure how this garbled speech that doesn't match her lip movement works but, in the end, she just gave up.

"You see? I can't tell the truth even if I want to. I'm literally compelled not to."

Nana's seems to believe it and relaxed her posture. "Please explain." She asked seriously.

"In the future, your contract is found by someone in the mainland, and you will be forced to follow that man's orders. You have extracted the lifeforce of many men and made him steal all the treasures and wealth from nearby villages and ruined many lives in the process, making this man rich but you were used, degraded and defiled. In the end, you killed those men and sought to take revenge against humanity. You would ultimately be killed by my son; the only man who would defy you."

Nana seems shocked to hear that and looks defeated.

"So, are you going to kill me?"

"If I wanted to kill you then I would've done it the moment you appeared out of that contract. If you are irredeemable then I admit that I would, but you are not that person. The fate of the world is at stake, and I cannot do it on my own. Even with my two subordinates, we cannot do this all by ourselves. We need your help."

"With what?"

Amy exhaled deeply to prepare herself to say these words. "I don't need your help now, but I need you to extract someone's sperm so that we can make a baby."

"I'm sorry?" Nana was taken aback by this.

Amy looked a bit ashamed to say this. "You see, Aron is the savior of the world. For him to be born, I need to have a baby with his father, but I don't actually want to sleep with him. You are the only being in the world that can make it happen without me actually associating with him."

Nana is confused. "Is that really necessary?"

"It is." Amy admitted. "The plan is to have my ovaries extracted once I am old enough, inseminate them then hire surrogate mothers to carry them."

"What is this threat that you're so worried about?"

"The Cambion." Amy answered and that immediately send Nana a chill. 

Nana may be a pure demon, but she is afraid of a half-demon. That's how powerful he is.

"Wh-Why should I help you? You basically admit that your son would kill me." she stammered.

"The reason is because you terrorized human settlements. But if you change your ways then that future will never happen."

Nana seemed silent for a moment then stared at Amy with newfound vigor. "Is that all you want from me? I do want to Cambion to be defeated but is it possible?"

"It is." Amy said. "I have the ability to purify anything, but my son would be stronger than me. He will be the one to end him."

Nana is lost in thought but she seems to be in board with the idea.

"What else?" she asked.

"I also need you to be a communication system to my subordinates at certain periods. Currently, only me, Alabaster and Boris can communicate with each other easily no matter the distance but everyone else can only receive our messages and not communicate back. You can traverse dreams and exchange thoughts no matter the distance."

"You set me free but that is quite a lot you ask of me."

"We will give you something first. We know that you despise consuming human semen as sustenance and sexual intercourse as the method instead of eating. It is your curse and one you cannot change. Boris and I have discovered a way to change that. It will take a long time, but you will receive transplant surgeries to remove your organs and replace them with artificial human ones that your body can assimilate. You will no longer need to consume semen or give your body away and instead live as a human."

Nana seems to be shocked to hear that. "You can do that?"

"I need to run some tests first but yes." Boris confirmed. "I had performed this surgery on vampires and other species of monsters, and they have been successful. Your demon biology is extremely rare so it will take years."

Nana could see that they are telling the truth. There was no hidden or malicious motive. "If you can engineer my body to be like a human then I'll take it!"

"Boris will take care of everything from here. So, are you in?" Amy outstretched her hand.

Nana seems reluctant to trust them, but she shook Amy's hand. She hates herself more than anything. If they could change her then she would take it.

"I have one last favor. Please do not call me Nana."

Amy looked confused. "I thought that was your name."

"In the Demon world, Nana is just a title used for consorts of the Demon King. Many people have mistaken that title for my real name, so I just allowed it to trick people into thinking that is my real name. But if we are going to work together then I might as well tell you my actual name. My real name is Caina." She said with an innocent smile.