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

"I hope that you will also be able to participate in this singularity restoration activity."

"Huh? What?" Thinking he was hearing wrong, the bored Momotaros moved a little closer. "Aren't I still being held captive by you guys?"

“Yes, this is also a test of imprisonment.” Mary nodded, her tone much gentler than when they first met. “If you can repair the singularity—”

"Then, the entire Chaldea warmly welcomes your arrival."

Large-scale strategy dungeon opens - London

“I see.” Nian Zhuo stroked his chin, looked at the plan in his hand and smiled. “So that’s what you’re planning, Mary.”

The meaning is clear: they hope that Ryotaro, Momotaros, and the others will form a team with Nenchoma and Ritsuka to participate in the repair work of the Fourth Singularity.

If the singularities are truly repaired, they will naturally gain everyone's trust and be integrated into Chaldea.

If they have any ulterior motives, they might try to shirk responsibility, or even sabotage the repair process of the singularity.

but……

At that point, the question will be what Nianzhuo should do.

"Sigh...you really know how to give me things to do." Nian Zhuo scratched his head, folded the plan, and put it into the pocket at his waist.

"So, what are your opinions?" Mary crossed her arms, looking at Ryotaro and the Immortals who seemed to be deep in thought. "Of course, we won't force you to participate—"

"—However, in Nianzhuo's absence, we must take appropriate measures for the safety of the organization."

This is now the final ultimatum; the rest is up to Ryotaro and the others to decide.

“That suits me perfectly.” Ryotaro nodded. “After all, we came here in the first place to help Nencho. As compensation for bothering us for so long, please let us participate in this event.”

"Eh, eh???" Momotaros shook her head, looking at Ryotaro and the other Imagin who had already decided to do it in disbelief. "I don't want to! Going to that singularity is too much trouble!" She sat down on the ground in a huff.

"Hey, Momotaros, don't do that!" Ryutaros wrapped his arms around his neck, fussing like a child, "It's such a fun thing, let's go together, let's go together~"

“Yes, after all, this is a kind of training.” Nodding, Kintaros raised his hand and patted Momotaros on the shoulder, the force of which made Momotaros stagger.

"I don't mind going with Mash and Ritsuka~" Urataros was even more understandable. After learning that Mash and Ritsuka would also be going, Nianzhuo even wondered if he would offer to go on his own initiative.

“Yes, Momotaros.” Ryotaro placed his hand on Momotaros’s shoulder as well, looking at him sitting on the ground sulking, and softened his tone. “After all, this is a good opportunity for us to show our abilities.”

"..." Turning his head to look at Ryotaro's face, Momotaros finally nodded. "In that case, I'll go have some fun with you guys."

“Yes, very good.” Mary nodded, her gaze sweeping over each face before her. “So, are you all ready? The world hasn’t been burned down yet, so we must reclaim our future!”

"Yes! We must be very careful this time!" Ritsuka glared at Nencho, then nodded solemnly. "Let's begin the operation!"

“Alright, then Romani, you and I will go and prepare for the spirit transfer.” Mary nodded, looking at Ritsuka with an involuntary smile. “I’ll leave everything to you.”

"Okay, Director Mary." Romani scratched his head, making a "working overtime" sound, and left with Mary, heading towards the control room.

“Well then, let’s take our leave here.” However, after Mary and Dr. Roman disappeared through the door, Ryotaro suddenly said goodbye to the three of them.

"Huh? What does this mean?" Ritsuka's orange side ponytail instantly perked up as she stared at Ryotaro in disbelief. "Are you leaving? What about what you just said—?"

"Ah, you misunderstood, Ritsuka." Ryotaro was taken aback at first, then smiled. "The reason we are saying goodbye temporarily is because we will be heading to your so-called 'singularity' in our own way."

"Buzz—" Suddenly, the hum of a tram came from behind them, and a huge gap appeared in the otherwise empty air.

The tram that Nianzhuo had first seen sped out along the golden tracks and stopped behind Ryotaro and the others.

"Wow!" Ritsuka exclaimed, her eyes sparkling with curiosity. "Is this... is this the train that Mr. Ryotaro took to get here?"

"Yes, that's right." Nodding, Ryotaro clapped his hands. "Alright, everyone, let's get on the bus!"

"Oh? Oh!" Momotaros and the others, who were fooling around in place, turned their heads and then scattered instantly, standing next to Ryotaro. "Hmph, I've been waiting for this for a long time!"

Just then, the familiar female voice came on the radio again.

"Anti-Summoning System, activated. Initiating Spirit Particle Conversion." Around Chaldea, the previously colorless screens gradually emitted a magical blue light. "Time remaining until Spirit Particle Conversion begins: 3, 2, 1..."

"Alright, alright, stop looking, Ritsuka." Ruffling Ritsuka and Mashu's hair, Nianzhuo pointed to the transfer pod that had already risen to the side. "You should go in now, okay?"

"Hmm~" Ritsuka pouted unhappily, "But I want to ride that..." pointing to the Time Train not far away.

"Hiss—" The airflow dispersed, and a kind-looking old man stood at the tram door.

Holding a cane, the old man looked at Ryotaro and Momotaros with a smile.

"Oh! Train conductor!" Momotaros saw a familiar face, put his hands on his hips and snorted, "How is it? The train is really boring without me—uhhhh!" Before he could say anything, Momotaros was pushed into the back by the swarm of Urataros and the others.

Finally, only Ryotaro slowly walked up to the captain.

"Oh, do you need a ride?" He smiled, then suddenly released his cane, letting it fall onto his raised toes, before lifting it back into his hand.

"Of course." Taking off his glasses, Ryotaro waved to Nencho and the others before getting into the car.

"Alright, alright." After waving to Ryotaro as well, Nencho pinched Ritsuka's cheek, who was still sulking. "When we get back this time, I'll tell Ryotaro that you can ride that train next time, is that alright?"

"Really?" Ritsuka stared at Nencho's face suspiciously. "Then let's all go together?"

"Alright, alright, I'll listen to you." Nian Zhuo sighed, seeing the magic light growing brighter and brighter, and could only nod. "So hurry up, there's not much time left."

"Okay!" Ritsuka nodded happily, then grabbed Mash's hand and ran towards the transfer pod.

“Then, I should also—” Nian Zhuo stood in the center of the spirit transfer spell, looking at the increasingly bright Chaldea above, and closed his eyes.

"The entire project is complete." At the same time, the tram's whistle rang out, and another opening appeared in the air, with golden tracks extending out, and the tram slowly started moving.

"Let's begin the actual verification. GrandOrder—"

The crystal-blue spiritual channel opened, instantly taking away the consciousness of Nencho Ritsuka and Mashu.

Gradually, as light began to flicker ahead, consciousness returned to her body.

The Fourth Singularity: London, the City of the Dead and Mist, has officially begun!

"Ugh... ugh..." Ritsuka, who was lying on the ground, slowly opened her eyes and sat up. "Where am I??"

"Ah, Master, you're awake." Mash, who had already changed into her armor, and Nencho, who was standing behind her with her eyes closed, said.

"...Hey, where are Ryotaro and the others?" Ritsuka looked around in confusion, but couldn't find them. "And—it smells awful. Mashu, how's the situation?"

The thick, pungent fog formed an impenetrable wall, making it impossible for one's vision to penetrate it.

"The spirit transfer was successful." Mashu nodded, but also looked around at the thick smoke with some concern. "This is... visibility... it seems to be obstructed. Fog...?" She twitched her nose, then covered it with a somewhat unpleasant expression. "No, maybe it's smoke, the concentration is so high..."

Then, as if to confirm something, Mashu raised her head.

"In the sky..." Mashu's gaze shifted, and she finally widened her eyes slightly. "I did find the same [halo] as before, but... even that halo is unclear due to the fog, or rather, the smoke—"

The halo in the sky, which usually brings a powerful sense of awe, is now obscured by the fog, making it impossible to see its shape clearly.

However, only the brightest edge reveals the other's presence.

"Is that so? So that's the singularity you're talking about." A familiar voice came from behind Nian Zhuo, who opened his eyes upon hearing it.

"Eh—?" Turning their heads in confusion, Ritsuka and Mashu saw Ryotaro adjusting his glasses... and the Imagin behind him covering their noses.

"It's Mr. Ryotaro! You're too slow~" Ritsuka turned her head away in a huff. "I thought you guys would be faster than us."

“Mom, there’s nothing we can do about it.” Ryotaro shook his head and patted Nencho’s shoulder. “After all, we don’t know what you call a singularity. We can only get here by detecting Nencho’s location.”

There was no further explanation, and even Ryotaro frowned as he looked at the thick fog around him.

"What exactly is this?"

A beeping sound rang out, and the communication devices of Ritsuka, Mashu, and Nencho flashed and beeped.

"Ahem." Mary's voice came through the communication device. "Can you hear me?"

"Yes, that's fine." The three nodded in unison. "Director Mary, what exactly are these things around us...?"

“Hmm, it’s good that you can hear it.” Mary nodded, looking at the thick, milky smoke around the screen. “Fog and smoke shrouding the sky… This kind of situation was not uncommon during the Industrial Revolution, but…” She looked at the screen and sure enough, there were layers upon layers of magical reactions surrounding Ritsuka and the other two.

“As expected, this doesn’t seem to be ordinary fog or smoke.” Mary raised an eyebrow in surprise. “I detected an abnormal magical reaction here.”

Meanwhile, the detection device had already turned red, but the pointer representing the concentration continued to rise, which Mary found hard to believe.

“Such a high concentration, very strong, extremely strong.” Mary used three degrees in a row to describe it, looking at the still rising pointer and tilting her head in confusion. “No, isn’t this concentration a bit strange? Isn’t it a bit too strong…? It’s like the entire atmosphere is filled with magic, and the magic has become one of the components of the atmosphere!” Biting her thumb, Mary spoke with unease.

"This will cause some harm to living beings. Mash and Ritsuka, how are you feeling?"

“I’m fine.” Mash shook her head, loosened her grip and then clenched it again, feeling no different from usual. “Maybe it’s because I’m a Demi-Servant? So what if I’m a senior?” Looking at the silent Ritsuka, Mash shook her head after a brief observation. “Looks like… no different from usual.”

"Well, I'm perfectly normal." Shaking her hand, Ritsuka dared not be careless in the face of the unknown situation, observing everything she could see in the thick fog.

“That’s good.” Mary hesitated for a moment, but continued, “What about Nianzhuo and… your friends?”

“Of course, I’m fine too.” Nian Zhuo shook his head, looking at Ryotaro who seemed to be deep in thought and the other demons who were muttering to themselves. “As for them… they seem to be doing well as well.”

“Okay, that’s good.” Mary nodded, but still added, “However, if possible, please try to keep Ritsuka and Mashu out of the fog. Right now, you all seem to be fine, and your vital signs haven’t changed much.”

At the same time, Romani's voice came from behind Mary.

“Mary!” He ran to Mary’s side, holding the report in his hand. “The results of the observation of that fog are in, but they may be a little surprising…” He handed her the report.

After a quick glance, Mary's eyes widened in surprise.

"First of all, Ritsuka and Mash, be careful." Flipping through the report in her hand, Mary's voice rose slightly. "This fog is harmful to life; ordinary humans will be killed if they inhale too much. However, it's a different story if someone develops resistance to magic for some reason, or if they are a magician, a monster, a Servant, or a Mystic."

"So Nianzhuo and Mashu are fine." Mary's gaze shifted back to the innocent-looking Ritsuka. "But why is Ritsuka unharmed... umm, why is that? Does Ritsuka possess some kind of poison resistance skill?"

"Is that so...?" Mashu's eyes widened as she looked at Ritsuka, who had no idea what was going on.

“No, there’s another possibility. Maybe it’s a blessing from Mashu… no, it should be the Heroic Spirit who fused with Mashu.” As she spoke, Mary changed all the affirmative sentences into uncertain ones in order not to reveal too much. “It’s possible that the Servant who fused with Mashu has strong resistance to poison or a powerful blessing skill, and this protection was also given to the Master. Maybe that’s why you’re alright.”

“While I’m happy to be able to help you, senior…” Mashu frowned, looking somewhat troubled, “it might sound a bit strange to call it a skill, Director Mary.”

“Well, Ritsuka is human after all, and she’s practically my disciple… I guess,” Mary said, stroking her chin and nodding seriously. “Then let’s call it the Poison Resistance Skill (tentative)!”

"Hmm...hmm...it's tentative..." Mashu nodded, finally looking satisfied.

"Alright, alright, in short, Foggy London has become a dangerous, dead city shrouded in magical fog." Mary tapped the table, and after watching Romani leave, she spoke again, "What's the situation around here? Have any victims been found?"

“No, Director.” Mashu glanced around and finally shook her head. “There’s not a soul on the road. It’s already two in the afternoon, and there’s not a single carriage, not even a single pedestrian. We haven’t seen any victims either, not a single person.” As she spoke, Mashu lowered her eyes.

“…It’s like a complete ruin.” After recovering in the blink of an eye, Mashu turned her attention to the surrounding buildings. “Also…within the confirmed area, all the buildings along the street have their doors and windows tightly shut.”

"I suppose it's because the appearance of the magical mist caused the casualties, and the survivors all took refuge in the houses. Is that so..." Mary nodded, looking at the reactions of the multiple life forms that suddenly appeared on the screen. "I've also confirmed it here; there are quite a few life forms reacting in the surrounding buildings."

Fog enveloped the area, on the street not far away.

A small, dark shadow flashed through the mist.