Thanks for the invitation. I'm in Type-Moon, inheriting the legacy of Zi-O.

“Senpai…” Mashu glanced at Ritsuka, hesitating for a moment, “We also—”

“Yes, let’s go together.” Ritsuka nodded. “What do you think, Mr. Nianzhuo?” She turned to look at Nianzhuo.

"Of course I don't care." Nianzhuo shrugged, indicating that he would follow their instructions. "After all, it's not easy to find a Servant we can talk to now, so let's go and see what's going on, Ryotaro?"

“Yes, let’s follow them. After all, it’s the only way right now.” Ryotaro pushed up his glasses and agreed.

"Hmph, don't worry." Kintaros patted his chest. "I'm very strong!"

"Hey—!" Mordred waved to them from the mist not far away. "What are you waiting for! Come on, catch up!"

"Okay! Coming right away!" Ritsuka nodded and then ran towards Mordred.

The streets were shrouded in thick fog, and the alleyways were completely unnoticed.

Following the blonde girl Mordred, they skillfully navigated through alleys, leading Nianzhuo and the others through places that most people would never notice.

London during the First Industrial Revolution: muddy roads, dim streetlights, and the vast, murky city canal.

It both showcased the superiority of the Industrial Revolution and was filled with the destructive force of the city.

The group weaved through the crowded streets of London, finally stopping in front of a building with a dim, yellowish light.

"This is it." Turning around and seeing that no one in Nianzhuo's group had fallen behind, Mordred nodded in satisfaction.

"Knock knock—" Mordred pounded on the door and waited with his arms crossed.

"You're here." A gentle male voice came from inside the heavy wooden door.

A clattering sound rang out, and the tightly closed wooden door in front of them was opened.

"Huh...?" The young man with glasses, beige hair, and emerald green eyes stared blankly at the large group of people in front of him.

"Yo." Mordred responded with a completely unconcerned smile. "I'm back."

“…Sigh.” The young man shook his head helplessly and stepped aside. “Anyway…everyone, please come in first.”

"Don't worry about it, please find a place you like to sit down." Leading them indoors, the young man's emerald green eyes shone with a gentle light.

The room was brightly lit, clean, and filled with the scent of pine resin.

And... a soft sofa.

"Ugh~" Lying down on it, Ritsuka slumped into a soft ball. "As expected, the sofa is the most comfortable~"

"Hmm..." Even Mashu, who had been tense, smiled and relaxed.

"Hmm~" A soft feeling came from below, and even Nian Zhuo could tell that the quality of this sofa was definitely not low. "Well then, let's get down to business."

"Hmm." Ryotaro skillfully found the sofa next to the table and sat down.

Even Kintaros, who always revered trials, had no resistance to the long-lost soft sofa.

"Yes, that's right." The young man pushed up his glasses, his emerald green eyes fixed on the group who had relaxed. "Since Saber brought them, they're probably not bad people. But please introduce them."

"I'll do it! I'll do it!" Ritsuka shook her head and sat up from the sofa. "Well, this all started from the very beginning—"

She told the gentle-looking young man in front of her everything that had happened when she met Mordred for the second time.

“…Ugh, really.” After listening, the young man pushed up his glasses and looked at Mordred, who was casually resting in her chair, with a hint of reproach. “Saber, you always tell strangers your real name right away. Didn’t I tell you? Didn’t I remind you? When you introduce yourself, you should only say your job class at most…”

His eyes were serious, and he frowned.

"Do you really understand?" The tone was slightly threatening. "Revealing your true name is equivalent to revealing your abilities. That's why Servants usually hide their true names in the Holy Grail War. But you... you so easily revealed your true name." Even the young man himself shook his head helplessly.

"It doesn't really matter, does it?" Mordred, who revealed her true name, seemed indifferent. "Besides, this isn't the Holy Grail War you're talking about anymore. There aren't seven or fourteen Servants, and there are no Masters anymore." Slapping her lips, Mordred looked around. "Hey, do you have any cider? I'm thirsty."

“Fourteen…” Nian Zhuo looked at Mordred with some surprise. “How does she know that there was once a Holy Grail War with fourteen Servants?”

"Ah, that's my favorite sofa..." The young man watched as Mordred walked confidently to his sofa and lay down, while opening the door from the corner behind him and picking up a glass. "Here, the cider is chilled."

“My God…” Nian Zhuo could hardly believe his eyes. He saw the device the young man had opened emit a cool breeze. “They had refrigerators during the First Industrial Revolution?” Mordred’s words confirmed his thoughts.

"Eh~" Mordred happily accepted the cup, then looked at the small device in the corner. "You even have a refrigerator here, which isn't common in many places. You're such a great scholar~"

"Because some medicines must be stored at low temperatures." Adjusting his glasses, the young man seemed unconcerned. "For scholars, refrigerators are a necessity."

"Yes, yes, yes." As if she already knew what the other person was going to say, Mordred gave a few perfunctory replies and then focused on enjoying her drink.

"...Glug, glug, glug, wow~" Then, she collapsed onto the sofa, downing the liquid in her glass in one gulp. Mordred let out a satisfied sound, "Ah~ I'm alive again! So this is what you have to drink after soaking in the magic mist~ Hmm—"

Mordred waved his hand as he looked at the silent Nian Zhuo and his group.

"What's wrong with you all?" He clapped his hands. "Why are you all sitting here in silence? Just relax. Treat this place like your own home. This is my temporary base."

"Ah, okay..." Mashu nodded, but still looked at Ritsuka and Nencho. "Nencho-san, and senpai, what should we do? Can we do as she says?"

“Hmm…” Nianzhuo tapped the armrest of the sofa, handing the decision over to Ritsuka. “Let you make the decision.”

"Yes, I understand." Ritsuka nodded and looked at the young man leaning against the table. "Sir with glasses, is that alright?"

"...Haha." Clearly, the young man hadn't expected Ritsuka to suddenly speak to him. After a moment of surprise, he waved his hand. "Well, it's alright. Since Saber trusts you, then you should be our comrades, right?"

“Ah, I haven’t introduced myself yet.” Standing up, the young man placed his right hand on his chest. “I am Henry Jekyll. I am a scholar—a scientist—in London. Although not a formal magician, I am skilled at concocting elixirs. By the time I realized it, London had already been shrouded in this magical mist in an instant. It was truly terrifying.” Although he said this, there was no trace of fear on the young man’s face.

"Although I also discovered that the fog contains magic..." A look of shame crossed the young man named Jekyll's face as he scratched his cheek, "I'm helpless against it..."

“Then he met me.” Mordred pointed to Jekyll and continued, “So we formed a partnership. This guy isn’t very reliable as a magician, but he’s still somewhat useful. So I’m mainly in charge of the operations, and he’s in charge of the investigation and analysis.”

“That’s right.” Jekyll pushed up his glasses and nodded.

"Excuse me—" After a long silence, Mashu finally asked the young man, "I'm very sorry, Mr. Henry Jekyll? This name... um..." Mashu hesitated, as if she wanted to say something but couldn't.

Then, Mary's voice came through the communication device on her wrist.

“Henry Jekyll… he shares the same name as a character in a novel, right? Is it just a coincidence?” Mary tapped her cheek and shook her head. “No, that’s not right. Or is he the prototype for that character? Mash, can you sense the aura of a Servant?” Mary asked Mash on the other side, raising an eyebrow in dissatisfaction as she looked at the still messy data on the screen.

“It won’t work here. Even indoors, the situation is the same as outside.”

“Me too, Director Mary.” To everyone’s surprise, Mashu nodded as well. “I can’t distinguish between humans and Servants by their aura.”

“How could that be?” Jekyll naturally heard Mary’s question and waved his hand with a smile. “I’m a real human being. If I were a Servant, I would have gone out to investigate long ago. Also, what were you talking about just now? A novel?”

“Yes…” Mashu nodded and voiced her question.

The Fourth Singularity Alliance - Yay!

“It should have been published a little earlier than this time.” Tapping her forehead, Mash told Jekyll all the details she remembered. “The protagonist in the book… shares your name.”

“Eh, is that so…” Jekyll nodded, pushing up his glasses. “I’m sorry, I still don’t remember… I’ve read quite a few novels. The protagonist’s name is the same as mine? Really?” After receiving Mash’s nod, Jekyll stroked his chin. “Hmm… if that’s the case, I shouldn’t have forgotten.”

Finally, since he couldn't find any definite memories anyway, he waved his hand and gave up on asking further questions.

"Never mind, let's not worry about my name for now. After all, names are everywhere." He straightened his clothes, walked up to the crowd, and bowed slightly.

"—Then, please allow me to reintroduce myself." A gentle male voice slowly rang out, "I am Henry Jekyll. I am simply a man who wants to stop my hometown from being trampled upon."

Standing up, Jekyll looked at Mash, Ritsuka, and their group with a similarly puzzled expression.

“Alright, now it’s your turn.” Jekyll held out his hand. “You guys should be a little different from us, right?”

“Yes.” Mash nodded, stood up, and grasped Jekyll’s hand. “We come from an organization called Chaldea—”

————Mash's Little Helper's Science Time——————

"—I see." Mordred scratched his head, looking at everyone slumped on the sofa in front of him. "Singularity^..."

“You mean—” Jekyll nodded, echoing Mash’s explanation, “that London in this era is one of the seven screws embedded in world history?”

“Yes,” Mash replied. “And we are searching for the Holy Grail that caused the singularity to appear.”

“I think I understand your situation.” Jekyll pushed up his glasses, the reflection in the lenses illuminating his thoughtful gaze. “Then let me tell you what we currently know about the city.”

“Okay.” Nian Zhuo didn’t pat Jekyll on the shoulder as if they were old friends, but instead crossed his hands on his knees. “I’m counting on you.”

“Hmm, it’s alright. After all, our goals might be aligned.” Jekyll shook his head, but his gaze shifted to Mordred. “So, Saber? Can I tell them?”

"...Whatever you want." Mordred took out another bottle of apple juice from the refrigerator and sat on the sofa. "After all, I'm only responsible for fighting. You can handle the brain-intensive stuff."

“Okay, sure.” Jekyll nodded, his emerald green eyes finally returning to Nianzhuo and the others. “Then, let me give you a brief explanation.”

“It started about three days ago. Every night, the entire city is shrouded in a fog that can kill any living thing. If the fog is thin, wearing a mask might save you from death. But if the fog is thick, that won't work. Ordinary creatures will be corrupted by magic just by inhaling the fog.” Recalling the horrific scene he had witnessed at the beginning, Jekyll frowned slightly.

"Although the reaction varies from person to person depending on their constitution and physical condition," he continued, despite some unpleasant memories. "But in severe cases, death can occur in less than an hour."

“The exact number is still unknown, but according to my estimate, the death toll should be in the hundreds of thousands.” He spread out a yellowed sheet of paper on the table, revealing a map of the entire city of London.

“Some areas have already been reduced to ruins.” He pointed to the red dots marked on the map, his tone slightly heavy. “London’s East End is almost completely wiped out. It’s probably only a matter of time before the city is completely reduced to ruins. All of this is because of that fog, that unusually dense fog filled with extremely thick magic—let’s call it the Magic Fog for now.”

“London shrouded in the fog of death…” Mash lowered her eyes, her mind filled with memories similar to this incident. “This is somewhat similar to an event that should have happened in the twentieth century.”

On December 5, 1952, a similar toxic fog event occurred in London, resulting in a tragedy that killed 4000 people within four days.

However, this is only the first Industrial Revolution, almost a hundred years before the 20th century...

“No, this event is a full century off from the historical timeline…?” Mary was initially puzzled, but then she remembered that this was a singularity and seemed to have found the answer. “So… that’s why it became a singularity…”

She pressed another button on the screen, and Romani's familiar voice came from the device.

"Romani, please help me investigate the events of the 20th century. I thought it only involved the city of London, but it turns out to be quite tricky." He rubbed his forehead.

"Okay, okay~ I understand, Director Mary." Afterwards, Romani turned off the device and started typing on the computer.

“It’s not just the Demonic Mist that’s troublesome.” Jekyll sighed, then looked at Nianzhuo. “You should have already encountered and fought against it. In these three days—besides the Demonic Mist, London has been filled with all sorts of other threats. Someone is taking advantage of the Demonic Mist to commit atrocities, using magically generated automatons, artificial life forms that can kill… and Chaos Machine Soldiers—” He drew out his words, as if what he was about to say was on a completely different level from what had just been said.

"—And there's a serial killer." Pushing the newspaper behind him away, Jekyll stared intently at Nian Zhuo. "The report calls him Jack the Ripper."

"A report...?" Mashu was somewhat surprised. In this place where ordinary people would die if they went out, there were actually reporters?

“Hmm, the newspapers were still being published on the first day the demonic mist appeared…” Jekyll glanced at the newspapers pushed away and shook his head. “But they’re gone now. (Scotland Park) – that is, the London police and the government – ​​are obviously unable to grasp the situation. In fact, government functions have begun to gradually collapse, and external aid has been cut off by the demonic mist. London is now in a state of isolation and helplessness. It’s been three days since the incident began, and the citizens who have stayed indoors probably won’t be able to hold on for much longer. Although the demonic mist cannot invade indoor spaces, once water and food run out, it’s all over.”

"—And if the citizens run out of resources and have no way to leave their homes, London will be finished." Nian Zhuo finished speaking about the consequences that Jekyll hadn't mentioned, and couldn't help but feel a little scared.

“…This is really serious.” Mary listened to Nian Zhuo’s addition, also somewhat fearful. “They didn’t die from the fatal magic mist, but from the lack of survival resources. The situation is extremely urgent, so I’m asking you, Mr. Jekyll, and Mordred.” Mary’s orange eyes were fixed on the young man with a gentle smile on the screen in front of her and the blonde girl sitting on the sofa.

"This is our proposal, and we hope you can help us find the source of this situation—the Holy Grail."

“That’s exactly what we wanted.” Jekyll nodded, glancing at Mordred beside him. “Right? Saber?”

“Alright, I have no objections.” Mordred nodded happily, stood up, and came to Mash’s side. “It seems this is the best solution.”

“That’s great.” Mary’s fist, hidden under the table, clenched quietly, and she couldn’t help but smile. “In a double sense, this is a huge help to us! So—” Mary nodded and exclaimed as she looked at the sudden reaction on the screen.

"—Mash, and Fujimaru Ritsuka." Mary tapped the table nervously, almost bursting into laughter. "This apartment building just happens to be built on top of a ley line!"

"Huh?" Ritsuka was taken aback at first, then her expression also turned to surprise. "So, we can set up terminal points now!"