Refuse to allow Conan to join the main storyline

After agreeing on the details with Kogoro Mori and watching the two men walk away, Koizumi sat quietly for a while under the shade of a tree by the roadside and took out a note from his pocket.

[There are some things I have to do, you know? ]

This time, Sakurai responded very quickly: [Do you really want to go? Have you really thought it through? Do you have no regrets? ]

Koizumi: [Yes, I have to go. I have to find out what is going on with this Matsuura Jun, whether he is the buyer of the course I am looking for, and what he wants to do in the school.]

【You will die.】

[I believe you have your reasons for saying that. But, I'm sorry, Sakurai. Are you going to stop me?]

[…No. No one has ever been able to prevent my death. It’s up to you.]

Koizumi, who was in a God's perspective, watched her write this sentence slowly but firmly, and couldn't help but frowning slightly.

"No one has ever been able to prevent my death"?

What does it mean?

Sakurai Izumi sat there blankly for a while, then continued to write on the note: [Although the time I spent with you was short, I was very happy. Thank you for showing me a different kind of scenery. Thank you, goodbye.]

After returning to his body, Koizumi reached out and touched his slightly dry eyes, and whispered to himself, "But I think I will survive. Do you believe me?"

Sakurai Izumi did not respond, but Koizumi heard Nekozuka's voice coming from the headset: "I believe it."

Koizumi smiled and said, "Nekozuka, are you nearby?"

"I am always here."

"Let's meet up first and discuss what's next."

"Okay, boss. I'll pick you up."

"…Nakazuka."

"exist."

"Do you think it's weird that I keep talking to myself?"

Mao Zuka was silent for a long time, which was rare. "...Boss, it turns out you know that you are a very strange person."

Koizumi: ...

------

Koizumi changed herself into light-colored casual clothes, left her backpack and baseball cap in Nekozuka's car, and then found a pair of glasses and put them on, trying to make herself look like a normal person who could walk in the sun.

Then, avoiding the sight of passers-by, she climbed over the wall again and entered the wall of Victoria Private Primary School.

Taking advantage of the fact that there were not many people on the playground during class time, Koizumi easily slid along the wall to the entrance of the teaching building, then walked in with confidence and went straight to the underground warehouse he had just visited.

When she was moving things in just now, she discovered that there were some incredible things stored in that warehouse.

For example, there were a dozen finished Pramiya bombs packed in cartons, and many more unfinished semi-finished products, which seemed to have been temporarily shelved due to a lack of raw materials.

Matsuura Shun should be one of the three anonymous buyers.

There were a lot of tools scattered around in the warehouse, all of which looked like they were the size of a child.

Could it be that this bastard teacher Matsuura Shun asked his students to help assemble and make these things?

What on earth does he want to do by storing so many dangerous items in the school!

As soon as Koizumi regained her human form, she turned on the portable video recorder she carried with her. She not only recorded the entire process of sneaking into the warehouse, but also explained it in a low voice.

"There is definitely something wrong with Matsuura Shun. I pretended to be a deliveryman and delivered a cardboard box to him just now. Half of it was glassware for experiments, and the other half was all gunpowder. If I had known that such dangerous things would be delivered to the school, I would have robbed them on the way. Now, let's take a look at what is stored in this warehouse."

Koizumi opened the boxes one by one and carefully searched every corner of the warehouse.

Glassware, packaged gunpowder, finished time bombs, unfinished bombs, and...

Koizumi looked at the small box in his hand and couldn't help swallowing.

This milky white thing in front of me that looks like a piece of chewing gum, could it be the legendary C4 bomb?

Matsuura Shun actually did something like this? What on earth was he trying to do! Was he going to raze the entire school to the ground?!

He always appears to be a gentle and approachable person in front of others. Could this guy be the antisocial personality mentioned in criminal psychology textbooks?

Surrounded by these powerful weapons, Koizumi was not afraid anymore.

She suddenly remembered what Kenji Hagiwara once said jokingly.

"Compared to a slow death, at least this is less painful?"

Actually, that’s true.

If these things in front of her really exploded, the result would only be the difference between her death being more complete or more fragmented.

Just as Koizumi was thinking about what to do next, the door of the warehouse was slowly pushed open from the outside.

Koizumi's first reaction was not to prepare for a fight, but to reach out to take off the headset and hide it in his sleeve. At the same time, he reached his other hand into his pocket and quickly pressed the shortcut key set in advance on his mobile phone. Then, before the people outside came in, he took his hand out again and pressed the gun bag on his waist instead.

"If I were you, I would keep my hands away from that dangerous place."

Matsuura Shun closed the door and stood at the door of the warehouse contentedly, smiling at her: "Detective Sakurai, is that right?"

Koizumi raised his eyebrows slightly: "Do you know me?"

Matsuura Jun smiled and said, "Of course, of course. There was a period of time when I could see you in the newspapers and on TV every day. So when I saw you in the delivery team today, I thought the police were waiting outside the school."

He reached out and gently turned the lock of the door. "But I didn't expect that you were even more stupid than I thought. You actually broke in alone to investigate. Ah, of course, of course, if you really came at night, I would have moved everything here. So, you are still a little smart."

Koizumi did not move his hand from the gun bag as he said. Instead, he slowly pulled out the gun from inside, aimed at the other party, and chuckled: "I still think it's safer to talk like this, what do you think? After all, you don't want to die under your own bomb. What exactly do you want to do with so many dangerous items?"

Matsuura Jun chuckled: "What do you think?"

"What's your connection to the recent bombings in Tokyo?"

"you guess?"

"You organized your students to make these semi-finished products as handicrafts, didn't you?"

"Haha, what do you think?"

"You were a bastard in your previous life, and a bastard in this life, so you will be a turtle grandson in your next life."

Matsuura Shun's face darkened.

"Why don't you let me guess this time? Because there's no need to guess, this is the truth, right?"

"Hmph, you're so sharp-tongued. You should first think about how to get out alive."

"It's easy. All we have to do is knock you down and call the police."

As he spoke, Koizumi slowly approached the man with the gun raised: "Turn around and put your hands up."

"Ha, you are indeed a police academy dropout. It turns out you use the same tricks."

"Don't worry about what method I use, as long as it works."

"Oh, what a shame. I was planning to have a good chat with you. I thought we would be like-minded partners."

"Oh? What do you want?"

"As someone who was also abandoned by school, don't you feel angry? Don't you think there are big problems with Japan's education system? Don't you want to make a change? Don't you want to be the right person?"

Koizumi: ...

She stopped and lowered the gun slightly.

Seeing Koizumi's reaction, Matsuura Jun showed a slightly excited expression and continued to speak: "When I paid attention to your experience, I knew that we would definitely be like-minded partners!"

Koizumi was silent for a moment. "I'm not a turtle. Who wants to be a partner with a turtle like you? Humph, so what are you going to do? Are you going to use these things you made to start a revolution? You are really underestimating the bureaucrats in power and the inertia of this society."

Koizumi sneered: "You will get nothing in the end except the title of a murderer."

However, the man in front of him was not provoked to the point of anger or even madness as Koizumi had imagined. He remained calm and even looked at Koizumi with scrutiny. After a while, he said, "Are you going to provoke me?"

"No, I'm just telling you the truth. Your idealism, like your antisocial personality, will eventually meet with disaster."

As he said that, Koizumi pointed the gun at him again and sneered: "Go to sleep, you can dream about anything."

Matsuura Shun was silent for a moment, then chuckled, "Ah, it finally turned out like this. What a pity."

As he spoke, he quickly took out a small gas mask from his pocket and put it on his face. At the same time, he took out a glass bottle with his other hand and threw it hard at his feet.

Matsuura Shun's movements were too fast, and by the time Koizumi noticed something was wrong, it was already too late.

Because of her keen sense of smell, the drug takes effect faster than a normal person.

She just managed to rush in front of the man before she lost consciousness and fell to the ground.