The Daily Life of the Inventor in Another World

R18 incoming, skip to 'Underworld' if you don't want to read

Without warning, Marcus pulled the silver-haired beauty for a kiss, her eyes widened. It was something she was not expecting and her magic didn't react to it at all. As normally she would have frozen anyone who tried to do that to her.

The teen wrapped his hands around her waist before going lower towards her firm rear gripping it through her maid's uniform.

While his lips were exploring the insides of her mouth; playing around with her tongue. And before long the maid was slightly moaning as she started losing herself to the pleasure.

She never could have thought that the feeling would be this intense. It was like experiencing the greatest of joys while being kissed by her Master!

Soon after, she wrapped her hands around him and started kissing back. Her eyes had already turned glassy.

The kissing intensified as she started rubbing herself onto him. Marcus already knew that she was turned on and wants to take this to the next level. So he lifted her quite casually and took her to the main area where the couches are.

He then laid her on her back and positioned himself on top of her.

Once there he started taking off her clothes, seconds later he saw her in a pair of sexy white panties, bra, and tight long white stockings.

"Quite sexy… can't wait to dress you up. Grayfia~~~" He said hotly into her ear as he started kissing her neck before going lower towards her towering breasts.

"Ahhh~~~ if that's what you want Master~~~" The silver-haired maid said softly as she touched herself for a bit. She is feeling like she was on fire.

The teen just smiled while starting to remove her bra and getting his first look at her incredible breasts. The moment he started to play with them, Grayfia moaned quite loudly. There was a shocked look on her face before being replaced by a horny look.

"Yes~~~touch me more...play with them~~~" She asked in a sexy tone as she looked hotly at him.

All she got from him was a grin as he continued his assault on her mountain peaks. Before long she was breathing haggardly and sweat was rolling down her forehead.

The beautiful maid's sensitivity was quite high and, by this point, Marcus could not take this anymore and wanted to move to the main dish. 

So his hand went down and removed her drenched panties and looked at her wet pussy entrance. His fingers brushed through it and Grayfia mewed from the touch.

"Hahh~~~ let's do it~~~ please... claim me~~~" She hotly begged him. She needs to seal the deal so that she could be his proper maid!

After hearing such a begging tone Marcus removed his pants and positioned his raging boner at her wet cave.

The silver-haired maid softly moaned when she felt the tip of his rod at her entrance.

"Yes~~~" She said as she started moving her hips, she wanted that thing in her special place, as soon as possible!

Without wasting much time he started pushing inside, she was so wet that there was no need for any foreplay. Before long he was already pumping into her without any restrain.

"Hhmmn~~~"

"Nnhhnn~~~"

"Ohhh~~~"

"That's it!!! More! Ravage me~~~" Grayfia howled from top of her lungs when she felt her first orgasm. She felt like her mind just went blank. The feeling she was experiencing was off the charts.

To experience more the beauty coiled her legs around his waist while Marcus used that movement to lean forward and claim her lips once more. The silver-haired maid answered back with the same amount of heat as she wrapped her hand around his neck and started moving her hips according to his thrusts.

Soon enough a lewd clapping sound started spreading through the workshop.

It only accelerated before a loud muffled moan spread throughout the place.

The beautiful maid just experienced her first creampie from her Master.

…

…

…

"And now you are my proper maid" The teen said to the silver-haired beauty who was sitting on her master lap facing away from him. Her legs are spread. His rod was still inside of her as he was still pumping into her while whispering into her ear.

"As long as I can serve you properly~~~ I don't care…" She said with a glassy look as she softly continued to moan to his thrust.

His only response to that was a squeeze on one of her nipples.

"Ahhh~~~"

Underworld

Both Rias Gremory and Sona Sitri were fiddling nervously as they were just called by Satan Leviathan herself to come to see her.

The younger Sitri has been slightly weirded out by her sister's behaviour for the past several years. Her older sister out of nowhere stopped her whole Magic girl act thing, she had been doing it since the 1990s. So it was very weird that her sister suddenly stopped.

And each time Sona would ask about her older sister's change she would hear only one answer… that it was utterly silly and she got tired of it.

While she sighed with relief since it was embarrassing, she knew that there was something more to it. 

"Do you know why we suddenly got requested to meet your older sister?" Sona's best friend asked with a slight bit of weariness. 

Strangely, they got this meeting just around the time that they had to move to the Human world!

"No, I am just as clueless as you are." Sona said that while shaking her head.

"I see… this is just weird. I heard a rumour that Satan Leviathan has been spending a lot of time in the human world." Rias said, a bit jealous.

"I have heard the same. And weirdly enough my sister has said nothing about her trips there." Sona said while fixing glasses, she looked quite sharp thinking about the reasons.

"That's because I can't tell you anything about it." 

Both girls heard Serafall's voice as the Leviathan circle appeared and with a burst of dark blue one of the Satans appeared dressed in a blue dress and high heels. She looked like she was about to go into a ball.

Both of the younger girls slightly gulped down seeing a serious looking Satan Leviathan.

"You can't?"

"I can't because I am under a devil contract." She said plainly as she walked over and took her seat opposite to the pair.

She got comfortable while the pair got very uncomfortable. They were seeing a very different Serafall to the one they used to see.

"I see… might we know what this meeting is all about?" Sona asked professionally but internally she hoped that it's not something bad like they were not going to the human world or something like that.

"The reason for this meeting is very simple; both of you are going to the human world, while there is nothing bad about it, Kuoh doesn't have any proper protection or surveillance installed to help the both of you control the supernatural flow there.

Since both of you are high profile peoples, there will be many who will wish to mess or simply to see how good the siblings of the Satans are." Serafall explained plainly.

"While I know both of you are talented there are many beings who are stronger than both of you."

"Are you going to send someone to...babysit us?" Sona asked in a slightly pissed off tone.

"No. We already discussed that. There won't be any bodyguards. But this doesn't mean we can't have a powerful surveillance system installed in the city that will assist the two of you, in case a powerful being appears in the city both of you will be able to notify the Underworld in time for help to arrive." 

As Serafall explained that, the pair looked at each other. From the looks they give each other they were planning not to notify anything. And the Satan Leviathan knows that already. That's why she likes what Marcus has planned.

"That's why I used the person, which I am under contract with, to assist us." As Serafall explained, she got extremely serious.

"Now listen up. It took me years to get his assistance in any form, so you two won't be destroying the trust I have built with him." 

"Uhh… is he a human? Assuming this is the reason why you are going to the human world?" 

"Indeed he is a one in millenia genius inventor. He summoned me as his devil and I formed a contract with him." Serafall said the very barebones needed for this.

"...He summoned a... Satan?" Sona asked with wide eyes. Rias was also surprised. They both know that Satans are summonable, but only the leaders of nations or extremely influential people can do that. Because the prices for it are very high. Since they don't take in souls anymore, it's usually in the form of money or items.

So, summoning them is practically impossible because the summoner has to intrigue Satan in the first place with something of worth.

"Indeed. By this point, his inventions are at least advanced by 40 years in human standards."

This made them even more shocked while Rias for some reason was getting a very anime-style vibe from this human.

"That's why when I asked for his assistance in building a surveillance system for Kuoh and he only agreed under a form of contract. Meaning that, the both of you will be under a devil contract and will be following his request to test the surveillance system which will be deployed in Kouh."

"...I see… this is more than acceptable then. Since we will be getting a reputation by having a contract formed with someone who has a contract with Satan." Sona said with a small smile. This was good for her.

Rias nodded as well. She was curious about this human. But, since it's under the care of a Satan she can't ask such an individual to join her peerage.

"Yes. Now remember…" Serafall leaned forward and her eyes were glowing and her magic presence manifested around the whole room. Both Sona and Rias gulped down nervously.

"I am sticking out my neck for this. We can't lose someone who is at a level that's even above the likes of Da Vinci. He has already created a pantheon level worthy security system in his hometown.

If we lose him and he joins Fallen Angels or worse, that bitch's Gabriel side! It won't be pretty." 

Both of them paled hearing that they quickly responded with a nod.

"We will treat him as a worthy guest! Don't worry sister." Sona quickly added. Now she knows what is going on. Her sister has a thing for him and she demands 'proper' behaviour from her family.

The younger Sitri has no idea how this human did all that. But one thing is for sure he is very good. So good that he made her sister fall head over heels for him.

Now she truly wants to meet him. Possibly her future brother-in-law?

Well… there are only a few days left till that day.

———

𝙅𝙤𝙞𝙣 𝙢𝙮 𝙥𝙖𝙩𝙧𝙚𝙤𝙣 𝙩𝙤 𝙧𝙚𝙖𝙙 𝘼𝙙𝙫𝙖𝙣𝙘𝙚𝙙 𝘾𝙝𝙖𝙥𝙩𝙚𝙧𝙨

-10 𝘼𝙙𝙫𝙖𝙣𝙘𝙚 𝘾𝙝𝙖𝙥𝙩𝙚𝙧

𝙋𝙖𝙩𝙧𝙚𝙤𝙣.(𝙘𝙤𝙢)/𝘽𝙡𝙖𝙢𝙚1

———