In Tempest's main building, a pink-haired girl gently knocks on a door. On the other side of the door, a little blue ball signed papers as he talked to a blonde muscular man and a small fairy.

A pink Oni wearing a shrine maiden comes to knock on the door.

"Rimuru-sama? I can enter?" - Shuna

"Yes, Shuna, go ahead" - Rimuru

Shuna enters the room and gives him a letter from someone.

"Excuse me, an invitation letter was delivered by Rain just now, apparently Guy-sama has something he wants to discuss in a Walpurgis." - Shuna

'Eh? Did something serious happen...?' - Rimuru

This was a surprise. Normally, Guy never calls Walpurgis instead he approaches the territory which happens until Diablo slams the door in his face.

"Guy wants to make a Walpurgis? I bet he doesn't even have the approval of three demon lords! And why didn't he send an invite to me!?" - Ramiris

"Maybe he has forgotten about you Ramiris!" - Veldora

"No one would ever forget an incredible demon lord like me! Isn't that right Rimuru?..." - Ramiris

"..." - Rimuru

"Rimuru! How can you?" - Ramiris

"Kuahahaha" - Veldora

"Oh never mind, Shuna, can you read the letter for us?" - Rimuru

"Of course, Rimuru-sama" - Shuna

"Rimuru-san, I'm making a Walpurgis, I have something very serious to discuss with you, don't forget to bring Ramiris, and also [...]" - Guy

"Something to discuss with me? Did I do something wrong?" - Rimuru

Rimuru was interrupted by Ramiris, who was screaming with joy.

"See, see? Master, he remembered, he remembered, I knew there's no way to forget someone as amazing as me!" - Ramiris

"I shouldn't have said that in front of Ramiris. Curse my mouth" - Rmuru

.......

Sometimes later...

Rain and Misery arrived to open the gate to Walpurgis for us.

In a round room, there were three people, Milim, Guy, and Ruminas, they were eating and talking while waiting for the other members of the octagram to arrive, then a portal opened, and from there Rimuru and Ramiris

"Oh, Rimuru-san, Ramiris, where's Dino?" - Guy

"He said he didn't want to come since you called so suddenly he preferred to stay in the labyrinth." - Ramiris

Dino was a lazy Demon Lord, so it was understandable that he wouldn't join in.  He enjoyed staying in Tempest very much even though he had worked as an assistant.

Of course, Guy is sometimes furious at Dino's refusal. He even curses him. 

"That lazy bastard...but that's okay, it's not that important." - Guy

"Eh? What do you mean it's not important? Even Milim and Ruminas have already arrived." - Rimuru

Rimuru was interrupted by Milim, who had his mouth dirty from smearing herself with food that Rain and Misery served. 

"Rimuru! How are you? Guy said you tried to play a trick on him-noda" - Milim

A trick? Rimuru was confused by Milim's words.

"Rimuru, it's good to see you again--" - Ruminas

While greeting Rimuru, Ruminas' eyes meet a not-so-pleasant person.

"Yo! Milus! How is it going?" - Veldora

"It's Ruminas, you filthy lizard! What is this lizard doing here?" - Ruminas

Veldora immediately took back the word he said. Ramiris came to defend him.

Ruminas and Veldora had a very strained relationship since both of them have a history. Veldora was responsible for destroying Ruminas's old castle, so for that day, Ruminas disliked Veldora even a small of his presence would cause her uncomfortable.

"He came as my subordinate, we were bored when Guy invited Rimuru so I decided to bring him." - Ramiris

"Tsk." - Ruminas

"Let's calm down, what did you summon this Walpurgis Guy for?" - RImuru

"Well, since half of us are already here and Dino won't come, I'll give a brief explanation, then we'll repeat it to the others." - Guy

"Hm!" 

Everyone turned their eyes to Guy, who started with an accusation. 

"RIMURU! What is this button? And why did you send me this?" - Guy

"Calm down, what button? I didn't send you any buttons!" - Rimuru

"So where did this come from?" - Guy

"Let me see the button-noda!" - Milim

"Sure, here it is." - Guy

Guy places something on the table. It's a red button. This confused everyone. 

"How will I know! I don't even send you a single thing. Why would I send this?" - Rimuru

"Hmm... have you ever tried pressing the button?" - Milim

"Of course not. I don't know what this is doing in my castle. Especially this button appear on my throne for no reason." - Guy

"Who would press a button who doesn't know what might happen?" - Ruminas

"No one would do that... no one..." - Ramiris

Ruminas looks at Veldora, who is the first person she thinks of when it comes to doing something reckless. Veldora gets this look and understands the opposite thing.

"That's not why! I take the risk! Give me the button!" - Veldora 

"I knew it!" - Ruminas

"No! I'm going to press it!" - Milim

No suprised! Even Milim would try to press it. Rimuru tries to stop them from causing another trouble. 

"Oi, oi, stop it, no one is going to press that button!" - Rimuru

"That's right, give me the button, I'll put it away." - Guy

Guy, Milim, and Veldora begin to compete in a battle of strength to see who will push the button. Rays of light came out of their hands, they were pulling so hard and the ground shook. Neither of them was willing to stop.

All this tension ends with a scream from Rimuru.

"STOP IT!" - Rimuru

They all drop the button at the same time, causing it to fall to the ground, and accidentally press down the red button. The world starts to distort.

"W-what happen!!" - Rimuru 

<<*&JK)(_)_(&#>> - Ciel)

'Ciel, ciel? What's going on?!' - Rimuru

Ciel received a massive error as she got infected with a computer virus. Rimuru knew something wrong with this button. Around them, the whole space is being distorted by unknown forces. 

"What the hell going on!? Did someone discover my place already! " - Guy

"EH? RIMURU! RIMURU! WHAT HAPPENING?!" - Ramiris

"As if I knew! This is your fault, Lizard. "- Ruminas

"What did I do!?" - Veldora

..........

A moment later...

RImuru and everyone found themselves in a strange world after the strange phenomenon. 

"How..!? We were transported to another world?" - Rimuru

"Really Rimuru? This is a strange world to explore around." - Veldora

"How about I give you a piece of your mind! Come here! Lizard!" - Ruminas

Veldora runs away from a raging vampire. Leaving Rimuru alone.

Rimuru and Ciel have a Conversation about this situation.

..........

'W-what is this place?' - Ainz

"It seems to be a different world from ours." - Demiurge)'W-wait, did we just get transported to another world?' - Ainz

"Hey, excuse me!" - Aqua

"Uh?" - Ainz

"I have a question. Where are we?" - Aqua

"!!!" - Aqua

"I'm back? But something looks different..." - Kazuma

"Hey! Hey! Kazuma! Kazuma! Look there! A living undead." - Aqua

..........

After transport, Guy, Milim, and Ramiris found themselves in a strange world.

"Where are we, calm down, where are Rimuru, Veldora, and Ruminas." - Guy

"I don't know, let's look for them." - Milim

"Look there! Blue-haired, must be Rimuru. OI RIMURU!" - Ramiris

"Eh?" - Kazuma

"Rimuru! I'm calling you!" - Ramiris

Aqua who was teasing the undead turns around, seeing a little fairy, a big red-haired man, and a little girl.

"I don't know who Rimuru is, but it sure isn't me! Wait a minute, we just found an undead and-" - Aqua

"An undead! And it has monsters along with it! Our endurance is about to be tested while they do what they want with us..." - Darkness

"Fufufu Looks like it's time to show off my explosion magic." - Megumin

"Wait a minute, I'm still thinking about what to do." - Kazuma

"Stop thinking and follow the program already!" - Aqua

"I should deal with them with my explosion magic." - Megumin

"No no, I'll deal with them alone~" - Darkness

"I will destroy them with my holy punch!" - Aqua

"Calm down, let's think!" - Kazuma

Milim is annoyed by their ignorance. 

"HEY, YOU THERE, blue-haired, I know you're not Rimuru, but even so, when someone is talking to you don't ignore it! Frey told me this was not right!-noda" - Milim

"That's right!" - Ramiris

"Hold on a second! A little girl." - Aqua

"Little girl...? Huh?" - Milim

A huge burst of aura starts to appear around Milim which shows how angry she is, Aqua hides behind Kazuma who has also smudged his pants.

"Milim, Milim! calm down, we have to find Rimuru! Calm!" - Guy

........

At the same time, Rimuru walked along with Veldora and Ruminas after they made peace a little bit.

He tried to understand what happened, but not even Ciel had an exact answer.

As he walked, Rimuru talked with Ciel.

'Ciel, what is going on?' - Rimuru

<< I'm master, it seems that there is a kind of interference, I can't analyze what happened.>> -Ciel

'How! I thought you knew everything.' -Rimuru

<<I don't know, as I said there seems to be an interference. It's possible we were sent here by a button that Guy found.>> - Ciel

Distracted by the conversation, Rimuru accidentally bumps into Ainz.

"Eh? I'm sorry, I was distracted..." - Rimuru

"N-no problem." - Ainz

Ainz was surprised because he couldn't sense anything from Rimuru.

'I didn't even feel her presence! What's up with this world!?' - Ainz

Rimuru slowly raises his head. He saw a skeleton with a dark coat. 

"Adalman?" - Rimuru

'Adal... man?' - Ainz