Other Siscon

The Underworld has been shocked by several things recently. One was the attack of the terrorists from the Khaos Brigade organization who attacked people at the Three Faction Peace Treaty conference, then the betrayal by the heir of Astaroth who was said to have joined the terrorist organization to carry out assassination attempts on the Three Faction Leaders one of whom was also their devil faction leader―Sirzechs Lucifer.

Fortunately, the assassination attempt was rumored to have failed.

But still, Diadora Astaroth's actions certainly hurt the Astaroth Clan, one of the most wealthy and powerful Clans besides the Gremory, Phenex, and Bael Clans in the Underworld. However, due to the good relationship between Azuka Belzebub, who is one of the Maou of the Astaroth Clan, and Sirzechs Lucifer, the other two Maou.

The impact was not too great and only made Astaroth's reputation decline slightly in the eyes of many underworld devils.

However, the news was quickly suppressed and temporarily forgotten by many devils because there was another news that was more shocking! The reason was this was about Sirzechs Lucifer's domestic relationship who was rumored to have divorced his wife. Grayfia.

Who doesn't know Grayfia in the underworld? She is one of the most beautiful and hottest women in the underworld with the title of "Strongest Queen" and is the wife of the "Strongest Devil" in the underworld, Sirzechs Lucifer!

Now news came from the Gremory Clan that Sirzechs had divorced Grayfia. Many devils and even creatures of other races in the underworld were shocked by this news. And unlike the previous shocking news, this news made many of them excited!

Why? It was because Grayfia, the silver-haired beauty was now a widow and no longer part of the Gremory Clan, right? Back then because of the protection given by the Gremory Clan and Sirzechs Lucifer, many of Grayfia's suitors and people who had evil intentions towards her could only swallow their greed.

But now? Many of them have their own ideas.

One of them and the most excited was a handsome silver-haired youth who looked to be in his twenties with his hair tied in a braid style.

Although his face looked calm, inside he was overjoyed at the news of his older sister's sudden divorce from Sirzechs.

"Onee-san... I don't know why Sirzechs was so foolish to divorce a woman as good as you. But that's good... Unlike before, now I might be able to meet you and make you live with me."

Euclid Lucifuge, that was his name. From his name, people in the underworld could tell that he was related to Grayfia Lucifuge.

And it was true, Euclid was actually Grayfia's younger brother! Grayfia didn't know of his existence, she only knew her younger brother disappeared when their parents and relatives were slaughtered after losing the war in the past.

However, the young man was in fact alive until now and he was living in the Khaos Brigade's main headquarters!

His identity in Khaos Bridge was not simple either, he was the most loyal servant and follower of the boss behind the organization.

"We can live together... Eat together... Sleep together... Take a bath... Ah... Onee-san... I can't wait to see your expression when you find out your brother is alive."

"Without the Sirzechs getting in the way, I can now move early for you."

Euclid's eyes flickered with a well-hidden obsession between love and lust.

There was something wrong with this young man, the things he said were not limited to longing for his older sister. Fortunately, what Euclid said was only in his heart. Otherwise, people who heard it would have been shocked because Euclid Lucifuge turned out to have an unhealthy obsession with older sister, Grayfia.

Grayfia herself did not know it, she did not know her younger brother loved her more than family love.

If she knew...

"Euclid, how are you?"

Euclid who had been busy in the laboratory gasped, he turned around only to see a middle-aged man with dark silver hair and brown eyes.

He immediately went up to the man and looked at him with an almost fanatical adoring gaze.

The man in front of him was none other than the real boss behind the Khaos Brigade organization. The boss she had been following all this time.

Unlike other devils including himself, Rizevim Lifan Lucifer was the son of the original Lucifer and he was a legendary character in ancient times who was still alive today.

Except for his older sister who betrayed the Old Satan Faction by marrying Sirzechs from the Anti-Satan Faction. As one of the devils of the Lucifuge Clan, Euclid revered the ancestor of all devils such as Lucifer and his true descendants such as the man in front of him.

"Rizevim-sama, I'm good. Can I help you?"

Looking at Euclid who was staring at him with his usual fanatical gaze, Rizevim stroked his beard and looked at the items on the lab table before saying: "That's fine. I was just wondering how your Sacred Gear Replica research is going?"

"About that... Sorry Rizevim-sama, except for some Sacred Gear below the level of Longinus I haven't managed to make a replica of Longinus yet."

Euclid looked regretful, just like Azazel, he also had the intelligence that made him capable of creating Artificial Sacred Gear. But of course, there was a limit to how far he could go, to get here he had experienced a lot of trial and error with the support of capital and research materials from the organization.

Rizevim did not look angry or disappointed, her expression was calm and there was only a faint smile. He patted Euclid's shoulder and said, "The matter of Sacred Gear research is not urgent, as long as the other things you make can help our plan, I actually don't care much about Sacred Gear."

"Besides my right-hand man, you're the best scientist in our organization anyway."

For the young man in front of him, Rizevim really didn't care about the Sacred Gear research that the other party was doing. From the beginning it was only Euclid's initiative who wanted to help the organization in that field and as the leader he only gave him approval.

As long as Euclid and the people in the organization stayed true to the organization's goal of ruling the world. That's what he said, but actually ruling the world was only the first step of Rezavim and the real goal he not told anyone including Euclid.

The goal had been set so long ago that even his long-dead family and his living grandson, Vali had no idea what he was after.

Hearing the understanding and praise from his boss, Euclid was happy and said: "I will not disappoint you, Rezavim-sama. As long as I have more materials like the Longinus fragment and the soul of the user of that thing..."

"Oh? You just said this. Do you really need such things? That's rather reasonable. It just so happens that soon we will start the plan to capture the user of Graal Sephiroth. I'll let you research that thing later.

"Thank you Rizevim-sama!"

"Well... Put that aside. Right now we have another problem."

Euclid's face became serious. Though he was sure that except for Keterea and Diodora's failure in attacking the people at the Three Faction Peace conference not long ago that was not too serious except for reducing the organization's combat power.

He was sure that there were no other problem issues that could make the Rizevim react. Even the deaths of Keterea, Diodora, and more than a dozen old devils did not make him care much.

So what was the problem?

"Should I gather everyone in the organization?"

"No, those people already know and I'm just here to discuss a mission with you."

"Mission?" Euclid was a little surprised, he was flattered that Rizevim had personally come to him for this and he said: "What mission is it? As long as it's what you want. Rizevim-sama, I will do anything for you."

"Hoho this is why you became my right-hand man, Euclid. Compared to others, I'd rather rely on you in this mission because I know you'll be happy to do it too."

Rizevim deliberately said this sweet thing to increase the young man's motivation, and even though he didn't need to do so. He also still did it to increase the other party's loyalty to him.

If doing such a small thing could make his pawns adore her even more, why not? Rizevim was so cunning and manipulative, in this situation he would still maximize any advantage he could get.

The fanatical Euclid of course had no idea what the middle-aged man was thinking, he looked at him calmly but had a look of anticipation in his eyes.

However, what he heard next still surprised him.

"Euclid, you must have heard the news about your older sister, right?"

"...Yes, I have."

"You must have an idea about your older sister, Grayfia Lucifuge who is now divorced from Sirzechs? You want to bring her to the organization, right?"

"Rizevim-sama, how..." Earlier Euclid still seemed to look down on Rizevim because he thought the other party did not know his little thoughts about his older sister. But she soon calmed herself down and said, "As expected of Rizevim-sama, I can't hide anything from you. So what should I do?"

Rizevim still smiled faintly. The thing he liked most about Euclid was the young man's intelligence. He did not need to explain so much about why he knew something and the young man would immediately understand not to ask questions and get straight to the point.

"Before hearing the news about your older sister. You must have also heard about the young man named Eiji Seiya who played a big role in the failure of Keterea and Diodora's plan, right? Sirzechs and Serafall speak highly of that young man. I heard he also became their younger sister's fiancé."

"Yes, but what does that human have to do with my sister?" Euclid frowned, he had indeed heard of Eiji Seiya, a human said to be powerful enough to thwart his organization's attack on the Peace Treaty conference.

But not only that, Euclid also knew Eiji Seiya's power was more than that.

Although it has not been 100% confirmed, but according to news that is not even a secret in the underworld that the terrible oppression that time made the hearts of everyone in the underworld tremble and feel inferior as if they wanted to bow down including himself who made him feel humiliated.

That's right, it was said that the aura of oppression that he even felt at that time belonged to a human named Eiji Seiya.

Euclid didn't believe it, he still doubted this information, but there was evidence in DevilNet such as the video where the human named Eiji Seiya killed Diodora with a deadly purple attack. In the video Diodora also looked very strong, having 14 devil wings which made him and the people in the organization surprised because they just knew Diodora was that strong.

Was it because Diodora was using Ophis' Snake? No, Euclid knew how much improvement one could get from using Ophis' Snake. So Diodora's power must have come from another source which made him curious of course and wanted to dissect Diodora's body if he could.

Unfortunately Diodora's body seemed to have vanished and turned to ash after being hit by the purple attack fired by Eiji Seiya.

An existence like Eiji Seiya would definitely be a huge obstacle to their organization's goals.

Even so...

"Well it seems you haven't heard the latest news that our intelligence managed to obtain. Your older sister, Grayfia is now living with Eiji Seiya as his personal servant."

"It seems that Sirzechs gave his wife to that young man for some reason."

"―!"

Euclid's expression froze and immediately became ugly when he heard this. Whether it was a hallucination or not, Rizevim saw Euclid's face slightly green which made him smile amusedly.

'Oh young man who loves his older sister so much... Euclid, I just found out you can make expressions like that.'

'It's quite interesting.'

As for Euclid? He was indeed feeling green at the moment. Actually he had been green all along because his older sister who was his forbidden object must have been touched by Sirzechs after they had been married for many years.

But after all this time, Euclid was already able to ignore the slight green in his head and felt it was fate that he had to endure the green in his head before his goal to rule the world with Rizevim and others succeeded. Once it succeeded, by then he would also be able to get his sister back and make her his own.

Sirzechs was also a pure-blooded devil and he was very strong which made Euclid feel at least someone like him was worthy of protecting his sister temporarily.

Even so that did not mean he would ignore the green hat given to him from someone else! And that person was Eiji Seiya! A human whose race was inferior to pureblood devils like them!

As a Lucifer loyalist, Euclid was very proud of his race and he looked down on races weaker than him such as the human race.

Although according to the information Eiji Seiya was a very strong human, even stronger than Sirzechs. But still! Euclid felt like blowing up this room if not for the Rizevim in front of him.

Imagining his dear older sister doing this and that with a human named Eiji Seiya.

The green feeling that he had long ignored now returned again making him feel very uncomfortable.

He tried to stay calm in front of Rizevim and asked. "So Rizevim-sama, what do you want me to do?"

Calm down...

Euclid is good at controlling his emotions, his expression has returned to normal.

His sister could fall for a devil as powerful as Sirzechs, but a human? No, he still believed his sister's vision was not that low.

Even if she became Eiji Seiya's servant, it must be because of a certain agreement.

Not that her older sister who was also not weak would let a human like Eiji Seiya do anything to her.

Yes! Her older sister must have only served Eiji Seiya honestly as a servant!

Euclid consoled himself, but unfortunately he had no idea what his sister was doing now.

If he knew, he would be even greener and would probably explode on that spot too because Grayfia was currently...

As Euclid and Rizevim continued their discussion.

In the human world, it was only about four in the morning and the sky was still dark.

Eiji was awake, but he kept his eyes closed and pretended to be asleep. Actually he wanted to burst out laughing right now, but he held back. Why? Well... Just now he checked the future using his "Future Sight" and the vision he got of someone made him want to laugh.

In his bedroom, on either side of him were Rias and Akeno hugging him. There is also Lala who sleeps on top of him in a koala hug posture. After Lala and the others returned from school yesterday, they were naturally told that Rias, Akeno and Grayfia would be staying at his house from now on. The latter was the first time they had seen and the silver-haired maid was acquainted with the others.

Nana glared at him there because it was her first time seeing the three womans and looked at him like he was trash. But as usual, no one supported the girl and she couldn't make waves.

Forget the flat-chested girl, what was more important now and simultaneously made him want to laugh was the movement under the blanket.

Precisely under his crotch covered by the blanket, without opening his eyes, Eiji could tell by his perception that in the dark room of the room when the girls from last night sneaked into his room. The silver-haired maid was using her sexy mouth to lick his morning wood.

The hot sensation mixed with the slippery cold that he felt made Eiji unable to hold back a small moan. Grayfia who was under the blanket jerked slightly at his moan, she thought Eiji was awake.

But hearing his soft breathing like a sleeper, Grayfia continued her "Maid" work that Asia had to learn later. Feeling the white liquid shot from Eiji's cock in her mouth, the silver-haired woman tried to swallow it all. Her expression under the blanket looked very lewd if others saw her, even her ex-husband had never seen her make such a lewd expression and he had also never experienced the service she gave to Eiji.

Sadly, Sirzechs did not conquer the arrogant Grayfia enough to do such a thing.

With her maid dress starting to wrinkle, Grayfia kept pressing her head against Eiji's crotch so that the delicious strawberry flavored cum in her mouth would not spill out.

*Gulp*

*Gulp*

Obscene swallowing sounds were heard inside the blanket, Rias, Akeno, and Lala were still fast asleep as the obscene maid sucked their man cock.

After swallowing everything, Grayfia let out a throat-length object out of her mouth with an expression of wanting to vomit.

With a satisfied smile afterwards and licking her lips, she quickly put Eiji's pants back on, got out from under the blanket and exited the bedroom quietly.

From her movements, she seemed to have gone to the kitchen to prepare breakfast.

"What a wonderful maid..."

Eiji never expected Grayfia to do such things while he slept, especially with Lala, Rias, and Akeno around him.

That woman seemed to enjoy his sperm very much without spilling a single drop from her mouth.

Do you like it that much?

¶{Host, you seem to have forgotten your passive ability called Strawberry Flavored Sperm.}

Hearing the name of that ability made Eiji feel embarrassed. His system gave him such strange things, but when remembering the description of the ability.

Eiji understood something.

"No wonder Grayfia who hasn't really loved me took the initiative to be with me so far. That woman... Is she addicted to the taste of my sperm?"

¶{Yes, she did.}

No wonder!

He remembered Grayfia staring at him with a heated gaze several times while at Rias's parents' house. The woman had done so in front of Rias' parents, Rias, and Sirzechs before insisting on becoming his servant.

In the original work where he didn't rewrite the bit while rambling using his inner voice. Actually Grayfia and Sirzechs love each other and they have a very good relationship. They have one child and although the protagonist Issei once bathed with Grayfia who is a little green hat to Sirzechs.

Their family relationship is very good and harmonious, but in this world...

Too bad it was reduced to Grayfia easily leaving her husband for another man's sperm that she was addicted to.

Not only did she give a green hat to her husband, she also gave a green hat to her siscon brother!

Why are there so many siscons in this franchise? Eiji doesn't know what the author of the original work was thinking, but that's good! That way, there are more victims of NTR because of sisters in this world.

As for Euclid and Rizevim having ideas about him? Eiji said that people who can see the future a week from now like himself don't panic.

¶{By the way host, do you want to check your rewards after all this time?}

"Ah... Right, how many days have I missed it?"

¶{It was 3 days.}

"Okay, then check for me."

Saying that, with the soft and fragrant sound of his girls' sleeping breath. Eiji felt his luck against sky.

There were three heroine sleeping with him at the moment.

So this thing called the system should give him something good.

¶{Ding! Congratulations host, you have successfully changed the plots of the Oregairu franchise by 37% and Highschool DxD by 46%!}

¶{In Oregairu, you have made Yukino and protagonist Hachiman's relationship more tenuous. Yukino liked you a bit after you saved her from a minor villain but that was it and your other achievement was tricking your teacher, Shizuka into dating you!}

"Oi what's with this perfunctory explanation. Can you be more formal as a system?" Eiji's lips twitched, he and Miss System were talking mentally from earlier. If not, the girls who were hugging him like a teddy bear might wake up.

However, Miss System was Miss System. From the beginning she was not a system that cared about formalities.

She ignored her host and continued typing.

¶{In Highschool DxD, you've managed to utilize other system users like Diodora to do dirty things for you, put a black pot on his head, and in the end you killed him so that people praised you as a hero. Very shameless, but as expected of my host.}

"...."

¶{Not only that. You also managed to make Sirzechs and Azazel indebted to you. Putting aside Azazel who only lost his toy data, Sirzechs lost his wife because of you.}

"Hey it's not my fault. Grayfia offered herself to me, okay?"

¶{Not long after doing a foursome with three heroines, you also managed to get Serafall's heart who only likes women shaken. After you used your lewd hands to play with her backdoor, that woman kept thinking about you day and night. She's intrigued by your masculinity and curious how it would feel to be pierced by your actual sword. Her siscon character is starting to crumble, I suggest you push her harder later!}

What's wrong with this woman?

By the way was it true that Serafall thought about him day and night? Eiji was curious but he was more curious what he got after Miss System wrote this much cool text!

Let's go!

Show me the rewards I got!

Being too excited, Eiji unconsciously squeezed Rias and Akeno's big asses which made both of them moan in sleep.

"Ahh~ Eiji, this is still too soft, you should do it harder."

"Ufufu~ Eiji-kun, use the whip, slap my ass harder."

These girls... They dream of lewd things even though last night they just slept normally while cuddling.

"Fuee? Eiji? Carry me on your back, take me around the city like this~"

Lala also started mumbling like a child in her sleep because of the girls' voices. But unlike those two lewd girls, she was dreaming of a beautiful and healthy adventure.

That was completely in line with Lala's character.

At this moment, Miss System finally stopped holding back his reward for so long.

¶{Ding! Congratulations host, you got the "Master-Servant Contract" and "Sub-System Maker"!}

...

A/N: If you want to read 8 advanced chapters with a faster update frequency than the webnovel, you can read it on my patreon whose link is below:

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