"Another idea?" Yoru looked confused.

[To perform the servant summoning ritual. We need relics and enough mana. Even if what you have enough mana. But there is a thing that is a bit of a problem]

"What?"

[I haven't finished modifying the magic circle we have to use for the servant summoning ritual. Ehehehehe...]

Yoru was silent...

[But, take it easy. Not that I don't have a solution]

"Continue?" Yoru couldn't believe it.

[Did you forget that you have a random box (God) in your inventory? A random box is a gift box that contains things that are most needed by its users. So in other words. If you open the box, you should get a solution to your problem] System explained.

Yoru hesitated a bit. But he complied and took a random box (God) from the inventory. And after Yoru observed the small box that was only the width of his palm and was black in color. Yoru immediately opened it.

A blinding bright light came out of the box. Yoru immediately closed his eyes. He felt that the box was floating and soon something landed in the palm of his hand.

After Yoru was able to open his eyes, he saw a piece of paper with a magic circle drawn on it was in the palm of his hand.

[Ohhhh... Either luck or disaster. this thing that came out]

"System, what is this?"

[Demon summoning ritual. You see what I mean, don't you? And not just any Devil. Gremory, one of the 72 Devil Noble Families of the Ars Goetia. You could say this is a high-level ritual. And the ones summoned from that circle weren't ordinary demons but High Demons. Equal or possibly stronger than King]

Yoru was silent.

"You're serious?"

[Yeah, it might be more useful than summoning a servant for now. Servants will indeed be useful later because servants will grow stronger together with their master. But, with the current conditions, this might be more convincing. Because we are still far weaker than King.]

"All right. Then let's just try it."

[Okay, I've prepared all the barriers we need.]

Yoru then channeled mana into the symbols on the paper. Before long, an excruciating magic circle appeared not far in front of Yoru.

[Use more mana]

Yoru then drained his mana bit by bit. The magic circle that was shining pink was turning a little red slowly. And the glow became redder the more mana Yoru used. Until finally the circle was a deep blood red.

Even so, Yoru still released more and more mana, until the light grew brighter and finally darkened and something like thunder came out of the magic circle.

Amidst the lightning that shot out from the magic circle. Someone come out of the magic circle.

A man emerged from the magic circle. He has shoulder length crimson hair and blue eyes. This man looks handsome. With blue eyes that look like calm sea water, a small smile that looks gentle. And a clean face. He is considered to have a fairly tall body. With the right body proportions, he not only looks handsome, but also dignified even though he is only wearing a white shirt with black trousers and black shoes.

The man blinked a few times and finally focused on Yoru. The two stared at each other and the man finally said something.

"It has been a while that someone called me from a magic circle. It is I, Maou-Lucifer from the Underworld, Sirzechs at your service. Are you the one that summoned me?" Said the man in a soft voice.

"Huhf, luckily I'm a man. Wish I were a woman. I would immediately attack you and take you to my bedroom" Yoru said.

"Hehehe... Thank you for the compliment." Sirzechs smiled.

"I'm indeed the one who summoned you here using this magic circle. But as far as I know, this magic circle belongs to the Gremory, not Lucifer."

Sirzechs nodded his head after seeing the magic circle that Yoru have.

"I know what happened. Did you see the color change of the magic circle you used?"

Yoru nodded his head.

"Firstly, if the magic circle is bright red, it means my little sister will appear. If it is blood red, my father will appear. And because you used too much mana and the circle turned black, I am this generation's Lucifer who appears." Sirzechs explained with a smile.

"Oppss, sorry, so it's my fault." Yoru lowered his head.

"It's fine, it's been a long time since I was called like this. So what do you want?" Sirzechs asked.

Stolen content warning: this tale belongs on Royal Road. Report any occurrences elsewhere.

"Wait a minute. Can Devil drink tea?"

"Yes, we can eat like humans. Even I often drink tea with my wife." Sirzechs replied.

Yoru then took out a table, chair and set for tea.

"Your magic is convenient." Sirzechs praised Yoru.

"Thank you. But with magic I have right now, my problem can't be solved. I'll tell you everything while we drink tea."

The two then introduced themselves. And Yoru then started to tell what happened. From the emergence of zombies. Which mana is now in the world. Up to the messenger of dead and King.

"From your story. This world is different from the world where I come from. In my world, Japan is a peaceful country. Even my younger sister also goes to school with humans in Japan."

"Oh... Demons mingling with humans. That means your home world can be fairly safe."

"That's right. There weren't too many problems back in my original world. If I may ask. Is "King" really that powerful?"

[Just answer maybe two or three times stronger than you are now.]

"Yeah, two or three times stronger than me. That's why I had to ask for help from demon."

"Why don't you ask God for help?"

"Aha... I know what you mean, since I'm human, so usually we pray to god right?"

Sirzechs nodded his head.

"All of this happened because of god. So, even if I met one. He would just said. "Fight on!" Like the girls of the cheer squad at a basketball game." Yoru replied with a slightly irritated face.

"Hahaha... Have you met one?"

"Three in fact. And all three say the same thing. This god is doing all this for his own pleasure. But he still does everything within a certain limit. So the problem is indeed big. But still has a solution. In this case. This magic circle." Yoru showed the magic circle he used.

"Besides, I got it from God. So indirectly. God told me to ask for help from anything that will come out of it."

"Heeeh... God here can be talked to." Sirzechs was a bit surprised by what Yoru said.

"So can you help me."

"Actually I really want to help. Because the one asking is you and this is also a long time since I was called. But unfortunately. With the condition of my current position, I am not allowed to do it."

"The world law."

"Yeah. I can't do much here. But don't worry. I have someone who can help you."

"Your father? Or your sister?" Yoru asked.

"My sister and her peerage can help you. Even though they may not be able to help you fight against the King, they can help you against the Queen and other chess pieces." Sirzechs then drank his tea.

[That's a good idea too. So you will fight King one on one. And with all the mana you have, we have quite a chance.]

"Okay, I can come up with a plan using your little sister's help. But, do I also have to call her like what I did to you?"

"No need." Sirzechs then snapped his finger and a magic circle appeared beside the table.

Not long after, a woman emerged from the magic circle.

This woman is very similar to Sirzechs. If they were the same age, they would be considered twins. What's different is that she has long beautiful crimson hair that reaches down to her thighs with a single hair strand sticking out from the top. Her hair also has loose bangs covering her forehead and side bangs framing her face. Her height is 172 cm making her one of the tallest female Yoru known so far.

And she wears a school uniform, which consists of a white long-sleeved, button-down shirt, with a black ribbon on her shirt collar worn under a black shoulder cape and a matching button-down corset, a magenta skirt with white accents, and brown dress shoes over white crew-length socks. And don't forget, she's a beautiful young woman with a voluminous body, white skin, and a buxom figure.

"Oni-san? Why did you call me? And where are we now?" The girl who came out of the magic circle looked confused.

Yoru then prepared another chair and tea set for the girl.

"Just sit down first. Have a drink first. The tea is delicious, you know. The cake too." Sirzechs handed some cookies to the girl.

The woman was a little surprised after drinking the tea and eating the cake that was there.

"That's right. All of this was provided by my new friend. His name is Yoru Kagami. You can call him Yoru. He doesn't like being called by other names."

"I'm Yoru, nice to meet you" Yoru bowed his head.

"I am Rias Gremory." Rias lowered her head.

"So? Did you just want to show off the tea and cake?" Rias looked at Sirzechs.

"Of course not. Actually Yoru summoned me through a magic circle, and he needs a little help."

Rias looks a little disbelieving. But after Sirzechs handed over the paper with the Gremory summoning ritual magic circle, she then looked amazed at Yoru.

"The problem is, with my current position, I can't do anything. That's why I called you here."

Rias nods her head.

"Then what kind of help?"

"Easy, you just need to help Yoru protect this place from the attacks of ten million zombies and a few creatures that might be as strong as you." Sirzechs replied with a straight face.

Rias was immediately startled and choked.

"Huh? What was it again?"

"Against ten million zombies and creatures as strong as you, the number is probably, one, two... Seven."

"Hahaha... Are you kidding me?"

"No, and you don't need to worry. Yoru actually is strong himself. It's just that because the number of enemies is too many, he ends up needing help. He also has around 200 people who help. So, this won't be difficult for you and your friends."

Rias was slightly surprised. Not only from the number of enemies but also because Sirzechs involved her friends.

"This is a chance for you to see someone other than demons who have the same potential as me or maybe more." Sirzechs drank his tea quietly.

"So I'll be here with Akeno, Koneko and Kiba."

"Yeah, good chance to practice."

"Sigh, alright. Though I'm a bit unsure if I can help with that many enemies." Rias then took four papers with a magic circle almost similar to what Yoru had.

"It's a magic circle for summoning me and my friends, so you will no call wrong person."

"Rias, are you still in high school?"

"Yeah, third year now. Akeno is also a third year, Kiba is a second year and Koneko is a first year."

"Would you mind if I summoned you at night? Since our opponents are zombies, they will only attack when night falls."

"It's okay. Usually a lot of people ask for help when it's late."

"Ah... Because you're a demon."

Rias nods her head.

"Yoru, do you have more of this tea leaves?" Sirzechs asked.

Yoru then took 3 boxes measuring 30cmX16cmX20cm. Yoru then took some paper and drew a magic circle. Then Yoru stuck the magic circle on the box.

"You can take this with you. If you want to take tea, you only need to remove this magic circle. If finish, you only need to put it back on. This magic circle is only to help the leaves stay delicious."

"Preservation magic. Can I research this circle?"

"Please."

The three of them then talked about magic until finally morning arrived.

"Ah... I don't know that the sun has risen."

Rias then stood up and walked towards the edge of the building's roof and looked around the area.

"I actually still don't think that this is another world. However, judging from the conditions around here, this place really isn't Japan."

"It's still Japan but in another world." Yoru drew closer and looked around him.

There he saw Saeko who was also looking at him. Yoru waved and Saeko also replied. Then Saeko is seen calling someone. And then Sizuka and the others drew closer and looked at him. Soon they were walking somewhere.

"Who were they?" Rias asked.

"Them. My wife." Rias and Sirzechs were shocked.

"You're married?" Sirzechs asked.

"Yes. 6 are already my wife, and two are not yet." Yoru answered proudly.

"Hahahahahahahahaha...." Sirzechs laughed and then walked over.

After that he held Rias's shoulder and pulled Rias away from Yoru.

Rias looks confused. But Yoru just laughed.

"I won't give Rias to you. She's mine" Sirzechs looked serious.

Yoru then laughed even louder.

Not long, someone opened the door leading to the roof of the building. Then Saeko and the others were seen coming out of that door.

"Yoru. If you want to leave you should wake us up first." Saeko pouted.

"Sorry, because I wanted to summon a demon, so I was a bit careful." Yoru replied with a smile.

Saeko and the others then looked at Sirzechs who was holding Rias' shoulder.

"Is that woman your new wife?" Saeko asked.

The others also looked curious. Megumi held her chest after looking at Rias.

"No! She's Not! She's mine!" Sirzechs screamed like a child who wouldn't lend his toys.

"Wha... I'm not. I will tell Grayfia-san." Rias said.

Sirzechs looked worried and confused.

Rias then broke away from Sirzechs.

"Nice to meet you, my name is Rias Gremory, I am a demon from the Gremory family. And I am not Yoru-san's wife candidate." Rias said

"Oh... But actually we don't really mind if you are Yoru's wife candidate." Saeko answered, and the others nodded their heads.

"We already have, humans, enhanced humans, half zombies. Adding demons is also not a problem. Maybe next time angels will also appear." Shizuka said.

"Even if you're not. Maybe he'll call someone else."

"Yeah, maybe next time he will summon another demon. And when asked "what do you want?" Yoru will answer "please be my wife." I can imagine something like that happen." Fiona replied.

Yoru just laughed.

Saeko then spoke a bit seriously.

"So, what are you all talking about?"

"Just a contract to fight the King. Actually I summoned Sirzechs, that man. But because he's not a demon but a Devil. He can't do a lot. So he suggested me to ask his little sister for help."

"Oh... are you done?" Shirley asked.

"Yeah, what's the matter?"

"Breakfast is ready." Shizuka.

Yoru then looked at Rias and Sirzechs.

"Would you like to eat first?"

"Not. I have to go back now. Otherwise my wife will pout a little." Sirzechs replied.

"Me too. I have to get ready to go to school."

"Okay, I'll try to call you again tonight."

Before long, a magic circle appeared under Sirzechs and Rias' feet. The two of them then sank into the magic circle.

After that. Yoru and the others went to have breakfast and prepared what they were going to do today.