I'm in Detective Conan, and the system has appointed Batman.

"...Try it again."

Chen En placed the previously seized black mask, which had been examined, next to the black mask that had just been completely removed from the face of the resurrected Miura Takeo, and said seriously.

"Let's try comparing the two masks side by side this time."

Koizumi Akako was somewhat helpless about this.

She examined both black masks separately, but the results were exactly the same. Now that they were put together, would there be any difference?

However, since she couldn't fight city hall, Koizumi Akako naturally planned to try again.

She slowly squatted down, yawning as she cast a red spell on the two black masks on the ground, intending to test them again.

As the red magic unfolded, a red magic circle immediately formed on the ground.

As the magic swept over them, the specific properties of the two black masks were revealed to Koizumi Akako, but just like the previous tests, there was nothing there.

Just as Koizumi Akako was about to look up and tell Chen En the cruel truth.

She suddenly froze, then lowered her head and used her red magic to scan again before saying with some surprise.

"...It really is a bit different."

"This mysterious prop has the characteristic of changing along with the main mask, so the masks made first or later are completely identical in nature."

"However, the magic content of the mask that was just taken off is relatively higher."

"Chen En, take that old mask away to a place a little further away. I'll use the magic mirror to see if I can find its location. If I can't find it, then we'll know the reason."

...The magic component is higher? And it's in such a case that the two masks are indistinguishable unless they are placed side by side?

A look of understanding appeared in Chen En's eyes.

Clearly, only the most powerful and skilled mages could discover the clues behind this.

Lucifer, as the Demon King of Hell, is probably even more skilled in this area than Koizumi Akako, so the magical items he provides can accurately capture these tiny changes in magical power.

However, Koizumi Akako had to carefully compare different masks side by side to reach this conclusion.

As for whether this is the case, you'll know once you try it.

Chen En nodded and immediately spoke.

"I understand. Use your detection mirror to check again in three minutes."

He turned around and prepared to board the Batplane, leaving temporarily with the old-fashioned black mask.

However, just as Chen En was about to board the plane, Koizumi Akako suddenly tossed him another bottle of medicine. Chen En immediately reached out and caught it warmly, his gaze falling on the surface of the bottle, looking at the dazzling colors inside.

He frowned slightly and asked.

"What is this for?"

Koizumi Akako immediately replied.

"Of course, it's to activate the effect of that old-fashioned black mask you're wearing."

"Although there is no way to map out Miura Takeo's own intentions by activating the effects of the old-fashioned black mask, it is still possible to simply activate the detection used to match the magic mirror."

"Don't forget, the magic mirror can only detect those black masks that have already been activated."

"Otherwise, you wouldn't need to spend the whole day running around. You could just collect and destroy all the black masks detected by the magic mirror. That would keep that guy Miura Takeo quiet for many days."

Chen En nodded slightly, said nothing more, boarded the Bat fighter jet, and sped away.

Three minutes is enough time for him to cross most of Tokyo's urban area.

After Chen En's bat-shaped fighter jet left, Koizumi Akako took out another bottle from her medicine bag that looked exactly the same as the first one, and her gaze fell on the new black mask in front of her.

Her other hand rested on the magic mirror used to detect the black mask, with a red magic circle drawn beneath it.

As soon as the three minutes were up, Koizumi Akako immediately activated the red magic circle, maximizing the detection ability of the demonic energy. In the blink of an eye, two black masks were simultaneously marked from the direction of their faces.

This situation surprised Koizumi Akako.

Could it be that our previous guesses were wrong?

Sure enough, I knew that such a slight change in magic power couldn't possibly cause problems with the detection magic. It seems that Chen En was indeed overthinking things...

The next moment, Koizumi Akako saw one of the black masks suddenly disappear from the direction of the face.

Koizumi Akako: ?

She was somewhat bewildered, unsure whether Chen En had unilaterally destroyed the black mask on her hand. Then, she heard Chen En's voice on the communicator next to her.

"Miura Takeo just resurrected using the black mask. Within the surveillance range, the resurrection location was very close to my current position, so I took him out... What were the results of the detection magic? Were you able to detect the direction of this old-fashioned black mask?"

The result is obvious: no.

Koizumi Akako's gaze fell on the magic mirror, which only showed a black mask on the front. She spoke earnestly.

"...Your guess is correct. It is indeed because of the difference in the magical composition that this magic mirror can detect the coordinates of the new black masks, but cannot detect the coordinates of the old black masks."

Upon hearing this, Chen En immediately understood.

It seems that what Takeo Miura will want to improve next is the issue of the different magical components in the masks.

However, now that we know that Takeo Miura is targeting this point, it is believed that Akako Koizumi will also be able to further improve the detection magic of the magic mirror in response.

After all, Koizumi Akako is the Red Witch, one of the Seven Witches, a great magician.

Soon, Chen En piloted the Bat fighter jet back and explained his thoughts to Koizumi Akako. Koizumi Akako's response did not disappoint Chen En; she answered decisively.

“Improve the magic? No problem, but I need a few more days.”

Chen En felt that the result was acceptable.

Although I don't know how Takeo Miura plans to improve the magical properties of the Black Mask.

However, even a great mage like Koizumi Akako needed several days to improve the corresponding detection magic, so it's likely that the speed at which the Black Mask is being improved over there won't be much faster than that of Koizumi Akako.

If that's the case, then he needs to put away all the old black masks in advance.

After all, this kind of old-fashioned black mask cannot be detected by the magic mirror's detection magic.

In this way, as long as all the old-fashioned black masks are stored inside the Bat Cave, it can be ensured that Takeo Miura will have no way to make any further moves in Tokyo.

We did it right away.

After sending Koizumi Akako back to her estate, Chen En immediately flew to the Tokyo Metropolitan Police Department.

Meanwhile, in a room specially reserved by the Tokyo Metropolitan Police Department for two people from the mystical world to perform shamanistic rituals.

The Grand Onmyoji and the Grand Magician were marveling at the effectiveness of the detection mirror in their hands.

The Gold Watch Team members who had already returned, along with Investigator Hakba Saguru, were also at a loss for words, only able to conclude that the two mysterious side-sitters were simply not knowledgeable enough in this area.

Even the members of the Gold Watch Group who trusted Ashiya the most and the Investigator who trusted Lorenzo the most were helpless at this moment.

Are you kidding me?

How could Takeo Miura possibly be wandering around Tokyo at a speed exceeding 340 kilometers per hour? Is he Superman? How could he move at supersonic speeds?

If Takeo Miura really had a supersonic speed of movement, then what would be the point of fighting?

It makes me laugh just thinking about it.

"...This, this shouldn't be happening."

"Could it be that there's something wrong with the composition of this magic? But we've checked it hundreds of times, inside and out, and we haven't found a single problem! This is a detection magic specifically designed for Black Mask, isn't it?"

Ashiya rubbed his forehead, feeling a bit of a headache.

Lorenzo, standing next to him, seemed relaxed and content, simply remarking casually.

"That's your business, not mine."

"Anyway, I've put in the effort, so you can't skimp on my pay... I didn't want to fight this kind of guy in the first place, and now that this guy can break the speed of sound, there's even less chance that I'll personally take action."

"Even adding money won't work, this is too much."

Hakuba Saguru looked at Lorenzo and shook his head slightly.

Why would someone possess such high magical skill?

If only he had such high magical skill.

However, just as Lorenzo was shirking responsibility and thinking about where to go for some fun that night, the great Onmyoji next to him suddenly exclaimed.

"Wait a minute, is that thing coming towards us?"

Lorenzo, who had just been shirking responsibility, suddenly turned around and looked at the Detection Mirror.

Wow, I checked, it really is moving towards the Tokyo Metropolitan Police Department at supersonic speed.

At this speed, in a maximum of one minute, they will be exactly where they are, appearing directly above the Tokyo Metropolitan Police Department...

Lorenzo immediately stood at attention and said with an awkward smile.

"Haha, I suddenly remembered I have something to do, so I'll go first."

Are you kidding me? Me, fighting a supervillain who can exceed the speed of sound?

I can't even catch bullets, isn't shooting at this just suicide?

The gold watch group member immediately stopped him, then said quietly.

“If you run away now, and I get caught, I’ll say you were the main force in dealing with him.”

Lorenzo: ?

You inherently evil Japanese public security brat, I'll personally take you down...

Oh no, I miscalculated. I forgot that the Japanese Public Security Bureau is a group of spies with no scruples.

Lorenzo immediately looked like he'd fallen for a trap and sighed.

He glanced at the dot of light representing the black mask that had aligned with their location, then took out his phone and began composing a message…

Upon seeing this, the investigator immediately perked up and asked a question.

"Do you have any powerful allies you can call for help?"

Lorenzo paused for a moment, then spoke.

"I'm editing my will. When I die, the money will be donated to a nearby charity."

"Otherwise, wouldn't I be suffering terribly in hell?"