Transmigrated into Conan, his ability is Rhodes Island

As everyone knows, there is only one poison in the Conan world: cyanide.

This highly toxic compound historically killed Alan Turing, the father of modern computing, and has also been widely used in assassinations. Kügburg developed a special air gun that could fire cyanide bullets, primarily to cause cardiac arrest in the target, thus disguising the victim's death as a heart attack.

However, because cyanide has a faint bitter almond smell, which could easily expose an assassination plot, assassinations using cyanide became rare afterward.

There are even cheaper and less likely ways to do it… Qiuyuan silently added in his mind. For example, injecting cigarette extract into the human body; you don't even need a real syringe, just a fountain pen nib with a push-type ink cartridge will do…

System: Stop! This is for all ages, are you trying to corrupt children?!

“Call the police, Nori. He’s threatening your life now.” Miyano Akemi pulled Nori’s hand and looked her into the eyes. She had clearly also immediately deduced from the bitter almond flavor that the chocolate might contain cyanide, perhaps something Miyano Shiho, a prospective drug researcher for the Black Organization, had told her.

“But…” Masano hesitated noticeably. Her gaze darted around, avoiding Miyano Akemi’s worried eyes.

“But we can’t conclude that Ms. Edamasa’s ex-boyfriend did this just based on a text message, a piece of almond-flavored chocolate, and an accident that may or may not have been an accident, right?” Akihara Kazumitsu chimed in. Although he believed that Edamasa Nori didn’t mean it that way and was probably hiding something, he still chose to give her a way out. “Can I see the text message you mentioned?”

Masano hurriedly handed him the phone. Akihara Kazumitsu took it and first glanced at the sender: an unknown number.

"How did you determine that the unknown sender was him?"

"I... I just had a feeling." As if suddenly deflated, Masano hurriedly argued, "Believe me, it must be him."

Akemi Miyano patted Nori on the back and comforted her, "Don't be nervous, Nori, take a deep breath."

"We definitely have to call the police, even if it's just for Mr. Kuwazawa who got hit on the head. But..."

“But the police might not file a case. If that happens, Nori will be in even greater danger, right?” Miyano Akemi looked up and met Akihara Kazumitsu's gaze. “Then, as long as it's proven that this chocolate is poisoned, that should be enough, right?”

"That's right," Akihara replied affirmatively.

“Leave it to me. I have a friend at a chemical reagent research institute. I’ll take the chocolate to him.” Miyano Akemi took out her phone and started searching. Then, she found the phone number she needed. “Akihara-kun, in the meantime, could I ask you to protect Nosato?”

Akihara Kazumitsu nodded. "Don't worry."

……

Police and an ambulance arrived quickly and took the unconscious man away from the ground. The police then took a brief statement, and after hearing that Akihara Kazumitsu had seen a figure flash by on the third floor, they put down their pen and paper, sighed deeply, and looked him straight in the eye: "You mean to say this was premeditated murder?"

Akihara raised his hands in surrender. "I didn't say that. I was just telling you what I saw."

The police officer taking the statement nodded in satisfaction and told everyone that they could leave. The police would be responsible for contacting the residents on the third floor and notifying Mr. Sangze's family.

Having witnessed the conversation between the police officer and Akihara, Masano Shieda became even more uneasy. She unconsciously bit her lip, occasionally pushed up her glasses, and nervously tucked her stray hairs behind her ears again and again.

"Ms. Shigemasa, where are you planning to go later?" Akihara glanced at the time; it was almost eight o'clock.

“Ah…” Edano became visibly uneasy. “I… I’m already very grateful to you, Akihara-kun. Thank you for your trouble, but I’d better go home…”

Akihara laughed, "Don't be like that, Ms. Eda. If my senior finds out I deserted my post, she'll definitely scold me." He clasped his hands together in front of his chest. "Please, even if it's just for my sake!"

Eda Masano relaxed a bit. "Okay, okay. So where shall we go?"

"I know a bar that's open until 6 a.m. Let's go there and wait for Miyano-senpai's news."

……

The two sat facing each other in a corner of the bar, each with a glass of bubbling water in front of them. Considering that they had already drunk beer at the izakaya, Akihara Kazuhiro declined the bartender's recommendation and ordered two glasses of sparkling water instead.

“Since we’re just killing time, Ms. Eda, could you tell us about your ex-boyfriend? And why did he want to get revenge on you?” Akihara Kazumitsu pushed the sparkling water toward her and asked carefully.

Without much hesitation, Eda spoke up, seemingly burdened by the matter. "It's like this..."

It turns out that Masano and her ex-boyfriend met back in school. She was about to graduate, and he was a junior in college. They met at a charity sale organized by the school. Masano had selected some books she didn't often use to sell, and her ex-boyfriend, Kazuhiro Mitsumura, was a volunteer at the event. Mitsumura fell in love with her at first sight and pursued her; they soon got together. Through Masano's description, Mitsumura learned that her ex-boyfriend was a cheerful, outgoing person who loved sports, had excellent grades, and got along well with everyone.

But not long after, she graduated and went to work in a different city. From then on, the two saw each other less and less, and after much deliberation, she decided to break up with her ex-boyfriend.

"It's my fault... I agreed so hastily back then, and now I'm the one who's breaking up with you first..." Shizuno lowered her head and wept. Akihara asked the waiter for a napkin and handed it to her.

The system somehow found a watermelon and started munching on it in Akihara Kazuhiro's mind. Its electronic voice was a bit muffled: "So you humans are really strange, loving hastily and hating hastily."

"Keep your voice down, and don't drip watermelon juice into my brain," Qiu Yuan said to the system in a disgusted tone.

He re-examined the young woman before him, mentally creating a personality profile of her. She was poor at handling interpersonal relationships, didn't prioritize practical personal interests, lacked independence, and was likely a dependent personality… According to her description, her ex-boyfriend seemed to love her very much. Would someone like her have initiated the breakup?

Based on her description, would someone with the personality of her ex-boyfriend undergo a sudden personality change after being dumped and go on a rampage to take revenge on everyone who gets close to her?

He shifted his gaze somewhat boredly to the glass of sparkling water. Frankly, he wasn't interested in their love story; the earlier conversation was just him trying to keep quiet because she seemed so eager to confide. If she wanted to keep it from him, so be it. His current task was simply to wait for the results from Miyano Akemi's side and then hand over the evidence to the police.

"Don't stop, keep asking." The system was getting impatient, still holding a half-eaten melon in its hand.

"Why are you, a silicon-based life form, so gossipy?" Akihara Kazumitsu glanced at it.

"What do you know? I'm doing machine learning... AI sentiment analysis!" Seeing that Qiu Yuan was truly losing interest in asking further, the system quickly added, "Keep asking, and next time you use an operator's skill, I'll give you... a 10% discount!"

Akihara's eyelids twitched. "Fifty percent off."

"No, no, the maximum discount is 20%."

"Okay, deal."

His face regained its concerned smile as he looked at Erimasa Nori, but his words were anything but polite. "Ms. Erimasa... what are you hiding?"

System: Who told you to ask that!

Startled, Masano stammered, "Wh-what? I didn't..."

Akihara Kazumitsu explained his reasoning, excluding the part about Masano's personality profile, to the other party in its entirety.

Shieda remained silent for a long time. She lowered her head. "You're right... our breakup wasn't just because of the long distance, but..."

Just then, the phone rang urgently. Akihara Kazumitsu apologized and answered the phone.

"Akihara-kun, is Nozato with you?" Miyano Akemi's serious voice came through. After receiving Akihara's affirmative reply, she continued, "I just received a call saying that Mitsue was in a car accident on her way home."

"You all need to be careful."