Refuse to allow Conan to join the main storyline

"If I'm not mistaken, you eavesdropped on a horse racer who always wins, intending to eavesdrop on his bets and then copy his moves?

“From the way you eavesdropped, you must have had someone follow this person and eavesdrop when he went to place his bets, and this person was unaware of it.

"It can be inferred that the person being eavesdropped on does not want to be called, or cannot be called for some reason. And you don't want your behavior to attract the attention of the other party or certain people.

"I boldly guess that this person must have inside information about the racecourse and was planning to make a fortune quietly, but somehow you found out. So you planned to take advantage of this opportunity without alerting the other party.

"In order to avoid being discovered by the other party, you asked different people to track and record each time. However, due to hardware problems, the recording effect was not good. People tried many times but failed.

"I guess your next plan is to have me eavesdrop on the other party while they are placing their bets. Is that right?"

Shinji Hagiya stared at Koizumi for a long while: "...How do you know that the person who follows and eavesdrops on them will be changed every time?"

"In order to avoid being discovered, it would be safer to have a few more people take turns tracking. At least in the two recordings you played to me, the people tracking were indeed different. Based on the weight and frequency of the footsteps, I guess the person tracking in the second recording was smaller in height and build than the first one."

"…You guessed all this after listening to the recording?"

Koizumi smiled and said, "It's reasoning."

Shinji Hagiya suddenly turned around and asked, "Masaaki, who is this woman?"

Doctor Gu drank his tea without saying anything.

Koizumi added: "I am a detective after all. Isn't this kind of reasoning basic?"

"Really? But among the detectives I know, there aren't many with a brain as sharp as yours."

"Hey, thanks for the compliment."

"Now that you have guessed it, how much do you plan to ask for?"

Koizumi smiled and said, "No matter how much you bet, I want a 30-70 split. You bet 30, I bet 70."

Shinji Hagiya almost spit out the tea in his mouth. He put the cup heavily on the table and turned around angrily: "Zhengzhang! Who is this woman?"

Koizumi spread his hands and said, "Mr. Hagiya, you said it yourself. You have tried many people except me but failed. You even failed to analyze it with instruments. Scarcity makes things valuable. Since there is no substitute for me, it is not wrong for me to offer a high price, right?"

"May I ask how much did you spend on hiring people and buying equipment? The sunk costs are so high, is it really okay? Oh, you also have a recording studio, didn't you build it for this purpose?"

Shinji Hagiya: …

Doctor Gu finally couldn't help but slapped the table and laughed out loud: "Shinji, you old fellow, you have been cheating people all your life, and now you have fallen into the hands of a young man! Hahaha, it feels so good!

"Hey, don't forget that I have to get a share of your business, too. After all, I was the one who introduced the person to you. You can't be so embarrassed as to throw me out as the middleman, right?"

Shinji Hagiya stared at him and suddenly snorted, "Don't threaten me, I can just give up on this!"

Doctor Gu spread his hands and said, "Sure, I don't mind. I have nothing to lose anyway."

Koizumi also imitated Dr. Gu and spread his hands: "I second the motion."

Seeing Shinji Hagiya's frustrated expression, Dr. Tani sighed with a wicked smile: "But if you give up, what are you going to do with your bet with that old guy? Are you going to admit defeat completely?"

This sentence seemed to hit Shinji Hagiya right in the heart. He glared at Dr. Hagiya for a long while with gritted teeth, then turned to Koizumi and said viciously, "The price you want is impossible, it's outrageous!"

Koizumi smiled and said, "I didn't say you couldn't bargain."

"Three-seven! I'll take seven and you'll take three!"

"No. I'll take 6 and you'll take 4."

"Impossible! I can only accept fifty-fifty at best!"

Koizumi smiled: "Deal. And you can give a share of my money to Dr. Gu."

Doctor Gu smiled and nodded: "Okay. It will be considered as your previous medical expenses."

Koizumi was a little surprised: "Huh? Didn't anyone pay for the previous treatments?"

Doctor Gu said cheerfully: "Salary is fixed, but kickbacks are dynamic. How can we generalize them?"

Before Koizumi could complain, Hagiya Shinji snorted and said, "I don't think your treatment as a recruit is that good."

Doctor Gu: "It's safe. The customer base is fixed, the work is easy and there's no danger. If you want to travel, you can go whenever you want. What about you? You're being watched closely by those people from the Metropolitan Police Department. They have to explain for a long time every time there's something wrong. Don't you feel annoyed?"

Koizumi: ...

It turns out that Dr. Gu has another identity.

No wonder Instructor Onizuka always sounded a little strange when he spoke to him before.

Doctor Gu sighed: "Anyway, I'm tired of living on the edge of a knife. I just want to live the rest of my life in peace and stability."

Shinji Hagiya sneered: "Do you think I believe you? Don't you feel wronged at all for being an ordinary school doctor in the police academy?"

"There's nothing wrong with that. Being with energetic young people every day makes me feel like I'm not that old. Besides, I always get to meet some interesting kids."

Doctor Gu laughed and said, "There are so many interesting guys this year."

Koizumi: ...

"Okay, okay, I'm too lazy to tell you this. You don't like to hear it anyway."

Shinji Hagiya snorted and was about to ask someone to draft an agreement, but was stopped by Koizumi.

"Forget about the agreement. I'll have my share anyway. You're a senior in the martial arts world, so you won't let the juniors suffer any loss, right?"

Shinji Hagiya pointed at Koizumi's nose and cursed, "You are such a cunning girl! You are worthy of being recommended by Masaaki. You are simply cut from the same cloth as me!"

Although he was being criticized, Dr. Gu still looked calm and composed, as if he heard nothing.

Koizumi: "If you say so, it's really a blessing from you. I hope I can live to this age."

Hearing her say this, Shinji Hagiya frowned and turned to look at his old friend. Although Dr. Hagiya's expression did not change, it was clear that there was a hint of solemnity.

Koizumi continued, "And I want to take out another 10% of the profit to buy something from you."

Shinji Hagiya: "...What do you want?"

"I know you and Kamimatsu Hisao are in the same business, so I may have to bother you more often in the future. I am not well-off, so this achievement is my advance gift."

"Humph, you are a girl who knows some rules."

"And there should be quite a few wiretap recordings like this. Could you please sell them to me? Or make a copy for me."

Shinji Hagiya was puzzled: "These are all expired recordings. What do you want them for? You...you don't want to exchange them for money, do you?"

Koizumi: ???

Change money? What money? Who to change with?

"Ahem, Shinji, you're overthinking it. She doesn't know that person." Dr. Tani said, turning his gaze to Koizumi, "I guess you're planning to use this for special training?"

"Yes. It can be done at home, which is safe and secure, while still achieving the desired training effect."

"Well, that's a good idea. But you should proceed step by step and don't force yourself."

"Ok, I know."

Doctor Tani glanced at Nekozuka, who had been kneeling silently behind Koizumi, and said, "It would be best if you, the assistant, could stay by the side so that if anything unexpected happens, it can be dealt with in time."

Without waiting for Koizumi to reply, Nekozuka said, "Okay, I'll remember that."

Koizumi: ...

I am the boss, right? Why are my employees assigned to other people's jobs before I even give the order?