-142- Step-by-step implementation

In the end, Rozen didn't actually explain where he had gone.

Because, revealing his whereabouts would inevitably expose the existence of the "Miracle" ring.

And Rozen still remembered the advice Roman had given him.

"No matter what, you must not let anyone else know about the existence of this ring, got it?"

He still recalled that advice vividly.

As a result, Rozen had no intention of exposing the existence of the "Miracle" to anyone, be it within Chaldea or in the world of automaton.

So, in the face of Olga-Marie's questioning, Rozen simply brushed it off. To Mash's inquiries, he offered comforting responses. Even Roman's questions were met with vague hints related to the "Miracle," after which Roman didn't push further.

But such a response was far from satisfying for others, especially Olga-Marie.

But what could she do if she wasn't satisfied?

Had Rozen ever truly compromised within Chaldea, from the past to the present?

Rozen had always been the troublesome one in Chaldea, maintaining a lukewarm relationship, neither overly positive nor negative. Coupled with his rocky interactions with Olga-Marie, he naturally wouldn't cooperate easily.

As a result, the matter came to a standstill.

Olga-Marie could only seethe with anger towards Rozen and impose a restriction on him.

"Starting today, you must report to the control room every day."

This could only be considered a mild punishment.

And so, the significant event of Rozen's three-month disappearance within Chaldea concluded in this unsatisfactory manner.

Although many couldn't accept it, since Rozen had returned, it wasn't too terrible, at least.

Moreover, these three months weren't entirely wasted on Rozen.

Thanks to the collective efforts of the surviving Chaldea personnel, they managed to restore over 80% of the facilities that had been destroyed by Lev's attack. This allowed Chaldea's operations to somewhat return to their former glory. Even the control room, which had been blown up, had been restored to its original state.

With this, Chaldea could now be self-sufficient.

Situated atop a mountain over 6,000 meters high, the facility was originally designed to be self-sustaining.

Had it not been for the fact that there was less than a year and a half left until the extinction of human history, Chaldea could have survived much longer. The only issue was the efficiency of resource utilization.

Now that Chaldea's facilities were mostly repaired, the work on correcting human history needed to take precedence.

"I'll give you one day to get yourself back on track!"

With that sentence, Olga-Marie flapped her wings, and left in a huff.

The scene was a bit comical.

"Anyway, Senpai, it's good that you're back."

Mash seemed to have forgiven Rozen for his sudden disappearance. Her mood changed quickly, going from bad to good. After a while, she started asking after Rozen and making sure he was okay, before finally letting go of her worries.

"Well, take a good rest, Senpai. We'll see you tomorrow."

Leaving these words behind, Mash also departed.

As for Fou, he had already disappeared as usual, off somewhere else for a stroll.

In the end, only Rozen and Roman, the two brothers, were left together. They left the control room.

Finally, Rozen could focus on completing his purpose for returning.

...

"This is..."

In Rozen's room, Roman held a bottle filled with blood and looked at Rozen with a somewhat stunned expression.

Meeting Roman's gaze, Rozen became quite serious.

"This is the blood of a descendant of a rare magical lineage."

Rozen offered this explanation.

"They have an innate constitution that allows them to use a secret technique called the 'Crimson Wing Formation.'"

Rozen's explanation quickly garnered Roman's understanding.

"Do you want me to analyze this blood for you?"

Roman asked Rozen this.

"Yes." Rozen didn't hide anything and simply nodded. He said, "With your skills, combined with Chaldea's advanced equipment, it should be fairly easy to do, right?"

Although Roman was often unreliable, he was, after all, an authority in the medical department. Currently, he held the highest position within Chaldea and stood in for the absent Olga-Marie, managing the entire facility.

Therefore, Rozen's plan to master the "Crimson Wing Formation" required Roman's assistance.

Of course, blood analysis was only part of it.

According to Rozen's plan, to truly master the "Crimson Wing Formation," he needed to analyze not only the blood of the Akabane clan but also acquire another equally rare item.

"You're interested in studying the Command Seal system of 'Fate'?"

Roman was taken aback.

This was Rozen's second purpose for returning to Chaldea.

"If I'm correct, to use the 'Crimson Wing Formation,' I'll need to slightly incorporate the Command Seal pattern."

Rozen asked Roman for this favor.

"So, Big bro, can you grant me permission to freely study the Command Seal system of 'Fate'?"

Only by fully understanding the structure and pattern of Command Seals would Rozen be able to implement his plan.

"This..."

Roman hesitated immediately.

If it were just helping Rozen analyze the "Crimson Wing Blood," that would be a simple task for Roman, taking no effort at all. He could complete it in as few as three days, or at most ten.

But granting Rozen access to the Command Seal system, that was a bit more difficult.

"The Heroic Spirit summoning system is the fundamental basis for Chaldea's existence. If something were to go wrong, it would be a huge problem."

Roman couldn't afford to joke about such matters.

If the Heroic Spirit summoning system truly malfunctioned, it would jeopardize the entire effort to correct human history. How could Roman entrust such power to Rozen?

And more importantly...

"If the Director finds out, she will definitely berate me to death."

Roman's reason shifted from a grand one to a more timid one.

Rozen rolled his eyes.

"Haven't you been scolded by that woman many times? Even if there's nothing wrong, she'll still scold you!"

Rozen straightforwardly pointed out the truth.

Roman didn't like that.

"Who... who said that? I'm not always getting scolded by the Director!"

"Is that so?"

"Of course!"

"Then tell me, is there a single day when that woman hasn't scolded you?"

"That..."

"And, even if she hasn't scolded you, has she ever praised you?"

"That... ugh..."

"Has she? Hm?"

Rozen kept pressing Roman, making him flustered.

"I... I get it! I'll grant you the permission!"

Roman threw his hands up tearfully, giving up.

Hearing that, Rozen finally nodded in satisfaction.