"2-22 is Professor Agasa's house." Yu said.
"APTX4869, do you know what that is?" Haibara looked at Conan.
"Huh?" Conan gave a forced smile. "What are you talking about? I don't know!"
"The name of the drug should be correct, because the organization ordered me to make it!" Haibara said.
"Org... organization? You made it?" Conan was greatly shocked by what Haibara said.
"Why are you so slow-witted! Shinichi! Can you still be considered the great detective of the East? You can't even handle such a small matter." Even Yu, who was standing by, couldn't stand it anymore and silently complained about Conan in his heart.
Haibara continued to provoke Conan: "Due to the spontaneous activation of the cell self-destruction program, all cells except nerve tissue, including bones, muscles, internal organs, and body hair, regress to their childhood state. It's a mysterious poison!"
"Haibara, could it be that you..." Conan thought of a possibility.
Haibara revealed a dangerous smile. "I'm not Haibara Ai. I'm Sherry. That's my codename. How about it? Surprised, Kudo Shinichi?!"
"You're an accomplice of the men in black!?" Conan said with a grave expression.
"You don't have time to be surprised, slow-witted detective." Haibara smiled. "I told you I live in the house at 2-22 Beika Town. Haven't you reacted yet?"
"Professor Agasa!!" Conan suddenly remembered what Yu had said just now. His heart jumped. He immediately picked up his phone and called Professor Agasa, but no matter how many times Conan called, Professor Agasa wouldn't answer.
Haibara started playing with Conan. Yu said he couldn't bear to watch any longer. "It's no use. You won't get through, because he's already... no longer in this world!"
Conan turned around, looking at Haibara with a very terrifying expression. "You... you..."
After that, Conan immediately ran to Professor Agasa's house. "Professor! You must be alright!"
Yu looked at Haibara helplessly. "Do you have to torment him like this? I suddenly feel a little sympathetic towards Shinichi. Be careful, he might retaliate against you."
"You, on the other hand, aren't afraid at all that Professor Agasa might be in trouble, you calm fellow." Haibara walked away with her hands behind her back.
"I have a strong heart," Yu said. "Well, actually, knowing that you took APTX4869, I knew you couldn't have killed the Professor. Because you're definitely being hunted by the organization. Shinichi was just too excited when he heard about the Black Organization, that's why you tricked him."
"Oh? Is that so?" Haibara continued to walk forward, not looking back.
Professor Agasa's house.
"Oh dear, I'm so sorry!" Professor Agasa said apologetically to Conan, scratching his head. "I've recently become obsessed with a computer game, so I often don't hear my phone ring."
"..." Conan didn't know what to say.
Haibara, who was following Yu, walked in. "I'm back!"
"Welcome back, Ai!" Professor Agasa greeted Haibara Ai. "How was school?"
"It was quite fun." Haibara put down her schoolbag, picked up a magazine, and sat on the sofa to read.
"She played me for a fool!" Conan complained to Professor Agasa.
"Who told you that after all these years you still can't remember Professor's house address? Serves you right!" Yu couldn't help but interject, mocking Conan.
"Exactly, exactly." Professor Agasa also joined Yu in denouncing Conan.
"By the way, you don't even know my home address, do you?" Yu suddenly thought of this point.
"How would I know! I haven't sent you anything, not even the annual New Year's cards; I deliver them personally!" Conan explained.
"Considering that you personally deliver the New Year's cards every year, we'll forgive you." Yu said to Conan with a serious expression.
"You!" Conan suddenly remembered that he hadn't asked the Professor about Haibara. "By the way, Professor, who exactly is Haibara?"
"Haven't you asked her yet? She's an accomplice of the men in black, and like you and Yu, she shrank after taking the drug. Strange, she told me not to tell you, saying she wanted to tell you herself..." Conan was about to speak when Professor Agasa interrupted him. "Oh, right! The name Haibara Ai is what I and she..."
"I'm not asking you that! I'm asking you why she's at your house!" Conan roared, interrupting Professor Agasa's endless explanations.
"Well, Shinichi, calm down. Listen to the Professor properly. Don't get so angry." Yu came out to ease the atmosphere.
"I was picked up by the Professor." Haibara, who had been reading the magazine, spoke up. "I collapsed in the heavy rain at your doorstep, and then the Professor found me..."
"You mean at my doorstep?" Conan didn't understand.
"Did you know? The Organization sent people to investigate your house twice, because among all the people who took that drug, you were the only one whose death wasn't confirmed."
"Of course, as the inventor of the drug, I also went along. However, the house was full of dust, with no trace of anyone having lived there, so the first investigation concluded there." Haibara turned her head to look at Conan. "The second investigation was a month later. The house was still full of dust, completely unchanged."
"Just as I was beginning to think you had died, I noticed something unusual about the closet. What was chilling was that your childhood clothes... were all there a month ago, but now they're all gone."
Conan's face was a little off.
Haibara continued, "During the animal testing phase, a white mouse didn't die and even regressed to its幼鼠 state. So it's not difficult to make this assumption: Kudo Shinichi might have regressed to a child after taking APTX4869!"
Hearing this news, Conan's body trembled. "So the Organization knows I've shrunk?"
"How could that be? If they knew you had shrunk, you wouldn't be alive today!" Yu comforted Conan.
"Thank me. I've filled in 'confirmed dead' on your file. Because you're a special case that particularly interests me, I want you to live. Although, reporting to the Organization, you might have been killed before being sent to me... However, if the Organization knows that I, a traitor, modified the data, they might start to suspect again."
"Betrayal?" Conan asked.
"Yes, during the testing phase, they arbitrarily used the drug on humans. That's one of the reasons I'm dissatisfied with the Organization... But the biggest reason is my sister." Haibara seemed to say indifferently, continuing to read her magazine.
"Sister?"
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