The Master Servant Crest was a skill that included several different kinds of crests/marks. One of them was the Master-Servant contract which came from the Anime Shinmai Maou no Keiyakusha/The Testament of Sister New Devil.
Aside from being able to tell one another's location, a curse would activate whenever the Servant either betrayed or felt guilt towards their master, and is shown by the varied colored collar that appears around their neck. Though the curse, which occurs varies based on whatever magical nature was used in order to form it. Another effect of the contract is that it increases the power of both the servant and the master as the servant's loyalty grows.
The last part of the description that Yami knew from the Wiki was what he was actually after. In the original there was also the part about it only working in a full moon, but it was very likely that the negative effects of the skill weren't copied and this "Master Servant Crest" skill worked differently and was just inspired by the original one.
Currently, Yami was sitting in the throne room hall of the castle the demi-humans had built. It was no match for something like Nazarik, but it was still awe inspiring and fit for a ruler.
Since he had thought of Overlord, he had also thought of another thing and thus his current seat wasn't the throne that looked as if it was made for a god…
"Maaasssttterrrrr~ To be used as your chair… I'm overjoyed!!"
Darkness was breathing heavily as she was on all her fours with Yami sitting on her back.
[The affection of "Darkness" has increased to 569.]
STATUS - AFFECTION
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Darkness: Please PUNISH me MORE Master (569)
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"Esdeath, Raphtalia. I have called you because I want to give you a special reward for your services."
The two were already on their knees, but lowered their heads even more.
"We have already received Yami-sama's infinite benevolence as you gave us our weapons that we shall wield for our lord."
Yami stood up from the Darkness-chair, for a moment her heavy breathing stopped, however, the next moment it got even worse as she silently moaned "neglect-play" "neglect-play" to herself.
With his fingers he drew something in the air. The lines stayed and a drawing, no, a crest flew in front of the both of them. For some reason, it made their hearts beat like crazy, as if it had the most important meaning in the whole galaxy to them.
It was a heart surrounded by two wings which encased it. It looked mesmerizingly beautiful and their gazes were drawn in by it as they stared at it in a daze. Somehow, it also excluded a kind of lewd vibe that made their thighs rub together.
"This crest is the proof that you are mine. Esdeath, do you accept it?"
"Yes, master. Please give me your crest."
Yami went up to her and lifted up her chin with his left hand. Next, he lowered himself a bit as well and kissed her in the lips.
Although Esdeath was a bit surprised, she instantly responded and they had a fierce battle of tongues, as always, Yami was dominating and Esdeath got hotter and hotter.
Then, she felt one Yami's fingers trace along her throat and draw the crest onto it.
"From now on, I shall be your master and you shall be my servant."
"Yes!"
Esdeath could feel some kind of connection appear between her and her master. She could now feel his presence and this presence alone gave her wet. But the other thing she felt as well, was a great surge in her power. A really great one.
She took out the ice-blue rapier which resembled a true piece of art by the most skilled of craftsmen. This was the weapon she had gotten from Yami. The rapier made her overall stronger, she could use her ice-magic through it, supported the magic and made the magic even stronger and it could pierce through anything.
In the reflection she could see the crimson red crest on her throat as well as the "collar" which made her incredibly happy as she looked at it. Now that she had this collar-crest she didn't need her old one anymore. The old collar was to control her, however, this collar signified something totally different, something way more deep. Her master had marked her with his crest.
[The constellation "God-father" is a bit confused and looks through the description once again.]
[The affection of "Esdeath" has increased to 1000.]
(... I see…)
After Yami had taken a short look at Esdeath's crest, he turned towards Raphtalia. Just like with Esdeath he lifted her chin and invaded her mouth. Raphtalia reciprocated the kiss with great vigor and happiness.
The crest which Yami drew onto Raphtalia's throat shined with the same deep crimson red light as Esdeath. In her case a second and bigger crest appeared on her chest area just like the slave mark in the anime.
"I swear to be your sword and follow you forever, Yami-sama!"
She could feel the connection and the increase in her strength as well. She was turly in awe before the things her god could do and was infinitely grateful for the fact that her lord had given her the honor of bearing his crest.
The two got a big giddy and Yami of course noticed that.
"There is a second crest which I would like to give you, follow me to my room."
The two knew what this meant.. And they were as excited as they could get!
"But first, I should give the crest to Mikasa and Tsunade as well..."
- - -
NFSW
Yami was in his bedroom together with Esdeath, Raphtaila, Tsunade and Mikasa who now also had his crest. It seemed that it could be hidden or displayed according to the wishes of the beareer. Of course Esdeath proudly showed it, same with Raphtalai, while Mikasa and Tsunade chose to not display it at the moment. If the "curse" of the Master Servant Contract were to activate, their marks would manifest themselves as well. But none of them had even an ounce of distrust, felt guilty towards him or would have ever even have considered betraying him. Thus the curse wouldn't activate.
(If I remember correctly, the effects of the "punishment" were different according to the person who made the contract. Maria was a succubus, thus her "curse" had an aphrodisiac like effect.)
{The skill you have is different from the one in the original. In regards to the curse, the punishment is decided in consideration of the person punished to find the best way to do it. But the normal punishment set by God was indeed the Aphrodisiac effect.}
The women were already starting to undress. Esdeath and Tsunade were already laying on her backs in a submissive posture.
"I will be giving you a lewd-crest. As the name suggests, it will heighten your sense of pleasure even more and you will grow stronger through it as it has an effect similar to dual-cultivation."
More pleasure? Was that even possible? That's what the woman thought since they were already feeling pleasure above the level of heaven or way of describing it.
Yami started with Raphtalia. He was already undressed since he could just make his clothes vanish.
He traced his fingers along her body while activating Wholesome God-Hands. She was shivering under every touch and her brain was getting the sense of pleasure from every single part of herself.
"Aaahhhh~"
She moaned in a very exciting tone. Yami turned around, now his face was over her pussy and his already erected dick was in front of Raphtalia's face. Without even thinking, she took it into her mouth and started sucking on it as if it was the most delicious thing there was.
Meanwhile Yami started fingering her in her crotch and it didn't even take three seconds before she came a lot.
Both their lower halves felt great. While still using his left hand to please her and make her moan as she was sucking on his cock, Yami drew another crest right above her crotch. A crotch tattoo. It was a heart with wings around it as well, however, it looked very very lewd and inciting at the same time. This was the lewd crest.
The moment he completed it and it started glowing in a purple light, Raphtalia felt as if all her nerves over her body and all her senses of pleasure had gotten a enhancer. She instantly came a great amount and it didn't want to stop. Her whole body suddenly felt even better, so great that she couldn't describe it with words, no, her mind wasn't even able to form any words or sentences besides one.
"PLEASE~! MORE!~~! GIVE IT TO MEEE!!!!"
The moment she finished her words, she felt something enter her pussy. And the next moment… Her mind was overloaded by pleasure. Her brain wasn't able to cope with the amounts of pleasure it received and shut down for a moment.
Her body arched as she took in his Perfect D. Her face became the greatest Ahegao that could even exist and her body started spasming under this feeling that transcended everything mortal and if words had to be used, this pleasure was extracestial and divine, a pleasure that stood above every joy and pleasure Raphtalia had ever felt.
Raphtalia's vagina walls squeezed Yami's dick and made him feel heavenly as well. Even as she was barely conscious, Raphatlia felt even better as Yami started thrusting.
The lewd rest didn't only increase their sense of pleasure, they also made their bodies lewd and thus it gave Yami an even greater sensation as well.
With one final thrust, Yami released his semen into Raphtalia who had already melted under the pleasure.
"Don't forget about us~"
Tsunade pressed her gigantic breasts against Yami's back as she whispered into his ear.
Yami slipped his tongue into her mouth, turned around and penetrated her. Because of the sudden godly sensation Tsunade hugged Yami, burying him into her mountains and layed down. Yami thrust into her and even the mighty ninja's stamina was no match for Yami.
He squeezed her breasts and nippels with his right hand while drawing the lewd crest with his left.
Just like with Raphtalia, the moment it was complete, Tsunade came like her life depended on it, her eyes rolled up and only through her hard training was she able to barely keep her brain from overloading. Her now lewd body also started to produce breast milk, which Yami sucked on.
[The constellation "Finally some good fucking food" want a taste as well, but knows that she won't get it.]
He conquered her mouth with his his tounge as he squeezed more and more milk out of her breasts which he would occasionally drink. His hand also ran all over her body, making every single part of her scream out in delight. And finally his penis which was thrusting Tsunade's pussy into submission.
Even with her mental strength and superhuman body, she was no match for him and within two minutes Tsunade.exe stopped working.
Esdeath and Mikasa who had stared at the whole thing in a daze until now nodded to each other and "attacked" him together. As warriors they knew that this enemy wasn't someone they could defeat, but they would do their best to hold on in this battle.
"Dedicate your hearts and bodies!"
Mikasa charged at the first enemy she could never hope to defeat. Not Titan was any match for the titan standing hard right in front of her. She took the ginormous cock into her mouth while Esdeath invaded the mouth of the greatest threat to their sanity.
[The constellation "Quotes" is screaming: "HEISHI YO IKARE! HEISHI YO SAKEBE! HEISHI YO TATAKAE!!"]
And the soldiers did scream, in delight and pleasure.
"Mmnnnaaaahhhhh~~!"
Even as they tried to suppress it, they weren't able to.
The moment they were "marked", they were willing to give up their hopes and dreams and die just to experience this pleasure.
Yami took Mikasa's hands, pulled her up and pounded her doggy style.
"YEEESSS! MOOOOORREEEEE!!! MOOOHHHRRR~~~"
Mikasa couldn't think of anything other than his dick anymore. She just wanted to feel better, longer. Even her ripped and strong body wasn't able to take much of Yami's pounding. But neither she nor Yami stopped, with her last strength she still moved in accordance with Yami. Her walls were hit but she didn't care, at the moment she only cared for one thing; Pleasure. She carved his D. SHe knew that she couldn't live without it anymore, but she didn't care. She was his since long ago, and the collar around her throat and the lewd crest above her crotch were proof of that.
Suddenly, she felt another jolt of pleasure that made her body go totally limp, but she was still held up by Yami and he proceeded to pierce right into her ass.
Both of them enjoyed anal a lot, even though Mikasa wouldn't admit that anywhere other than when her brain was fried by pleasure just like now.
Yami pulled her back once more, making his penis reach deep into her asshole. At that moment she arched back while screaming out in delight before slumping down on the bed as that was wet all over.
Esdeath was the last one standing as she was still kissing with Yami and had her breasts folded with one of Yami's hands.
He summoned a black whip and whipped her ass. Already having been trained thoroughly, Esdeath got on all her fours and invitingly offered her pussy up to him.
Yami slapped her butt with his hand making her moan like an animal in heat.
"Ooouuuuuuhhhaaaaaaaa! MORE MASTER! PUNISH THIS HORNY, LEWD SLAVE MORE!"
Yami arched lower body back a bit and with great speed he penetrated Esdeath, directly into her deepest parts.
"YESSHHH! THIS IS IT! THIS IS MASTER!"
He forcefully turned her so that she was facing him and stuck right in the next moment. Yami could see Esdeath's face transform into a lewd horny ahegao of a bitch in heat.
"It seems that this bitch slave wants even more pleasure than she can handle… This calls for more punishment!"
A flame appeared on Yami's finger as he burned the lewd crest into Esdeath. She moaned in great pleasure at the pain she felt.
The next moment, she grabbed Yami and hugged him onto herself as if she wanted to become one with him. His D reached even further, slamming against Esdeath's walls. Her moan was stopped by Yami's mouth as he kissed her while simultaneously folding her breasts and pounding her into places greater than heaven.
Her breasts started to produce breast milk as well, which Yami sucked out and then continued kissing Esdeath. She got a taste of her own milk, but the taste of Yami's tongue and dick were superior to anything and everything else.
Yami slapped her ass and Esdeath gasped for air as she was moaning.
This dick thrust into her pussy faster and faster.
"MASTER'S SEMEN! GIVE IT TO THIS BITCH!"
Yami released his big load right into her which normally would make anyone pregnant. But Yami still didn't plan on having children yet, he already had two adoptive daughters.
She fell onto the bed right next to the other three. All of them had the time of their lives.
Yami grabbed his whip once more and with his honed skills, he let it shoot out towards the door. It wrapped around the handle and pulled it down.
"Who do we have here. A naughty blonde fox, I think this calls for more punishment."
He swung his whip again and it wrapped around Darkness's waist and whipping against the spot above her tail which was particularly sensitive just like her tail and ears.
The next moment she was dragged across the floor Yami pulled in his catch.
She had a masochist smile on her face and her cheeks were flushed by this rough treatment. This was her lord, this was her master! Only he could make her feel such great pain and torment!
"Let's see how good you can handle the lewd crest."
Yami grabbed her by her arms, tied them together, the same with her feet. Now she was in a bondage. He traced his finger along the whip which made Darkness instantly wet herself more and more.
As he swung down the whip, the whole room was filled with cries of pleasure.
Once he used the lewd crest on her, her mind broke the moment she was pierced by hid D. She laid there unconsciously with an ahegao for several hours.
All of the girls layed next to each other with the happiest and sluttiest faces possible for them.
NSFW END
- - -
Yami could feel his strength had significantly increased through the effect of the Master-Servant Contract. The more loyal the servant was to their master, the stronger they would both become and all of them had a ridiculous amount of affection and each of them had a lot of individual power. Especially since they were still leveling within Aincrad which was flying above them.
They had already advanced to the next floor. It seemed the way to enter it was just by laying "Link Start" and one would be teleported to the place where they last logged out.
Within Aincrad, their abilities would be limited and they would all receive the system which was managed by Quinella. Kayaba also occasionally looked after it, but Quinella was the admin while Kayaba was researching new technology within Paradise.
Now that they had a genius in Paradise, the city had become very modern and Kayaba was already planning on testing out a fusion between technology and magic.
He was very satisfied with the progress of his own world. It had already expanded a lot and Yami was sure that if it went on, they wouldn't need long to be able to rival countries. Although there weren't that many residents yet, there were a lot of buildings built by the demi-humans. It was already too large to call it just a city, but it was still too small to be called a country, especially since there weren't that many people living there.
However, if it came to the power of Yami's world and maybe a war with another country, that would be a totally different thing. Every single person within Paradise was strong. The amount of resources they could produce was absurd since the soul world for one made plants grow faster and better, had a seemingly infinite amount of resources and the golems would work day and night on the fields or in the created mines. All of that was without taking into account that Yami could create almost anything within Paradise as long as his energy was sufficient.
Yami was indeed preparing his world to be able to fight a war.
"Strea, could you please look into modern arms, how they work and how they are created? Once you are done, could you tell the girls to start a small production?"
Strea's voice was enthusiastic since she could do something to help her "father" and instantly went to work and searched through the internet.
"Yui, could you please tell Kayaba to look into the creation of electricity and energy through magic? Paradise is full with energy and mana, if we could convert that into electricity we would have an infinite supply."
Just like her "little sister" Yui was happy to be of use to her papa and logged herself into the computer of Kayaba.
(Kayaba really has a lot of tasks, I should meet him next night and discuss things with him. But I guess that he isn't actually that displeased. From what I have heard, he is all fired up for researching magic and creating new stuff… Eve, what are Asuna and the rest of the SAO girls doing?)
{They are currently fighting within Aincrad to become stronger. They had a few duels with the other women in Paradise and all lost. After that they went there to level up more.}
Yami mentally nodded. After that he contemplated the Waifu-gacha.
He was by no means weak and there weren't many waifu's that would immediately threaten his life. There was also the fact that he was being targeted by a certain person.
(Eve, tell Sachi to wake up Esdeath, Mikasa, Tsunade and Raphtalia. Darkness can be left in the state since she would probably enjoy not being able to move her body. And the four cat-girls should also come meet me. Chocola and Vanilla will be working in the Anteiku soon.)
{Done. My love, you can directly contact the women who have your servant crest.}
Yami tried it and it worked.
After a few minutes, all the women rushed towards him and fell to one knee behind him, except for Mikasa and Tsunade. Their lower parts were still very sore, but after hearing that Yami called for them, all their fatigue vanished and Sachi didn't even need to use her healing or anything.
"First, I have called you since I want to talk to you a bit about the outside world. I plan on letting you exit Paradise as well. Chocola and Vanilla, as I promised, I will let you work in the cafe that I talked about. But that will be after the second thing I called you here for. I'm planning on summoning another woman, just like with you, Esdeath and Mikasa. However, I don't know whether this person is friendly or if she might attack. Thus I want you to be on guard and block all attacks. But you aren't allowed to initiate any act of aggression yourself. Have I made myself clear?"
" " "Yes!" " "
All of them said in unison and got ready.
(Eve, use the Waifu gacha...)
[The constellation "God father" is smiling at your passive skill "King of Knight".]