Traveling back thirty years to Conan, intercepting Princess Eri

Didan High School.

Lin Xiuyi and his classmates' first class today was, as always, math, a subject that evokes both love and hate.

Takeshita Matsufumi, an elderly man who had worked in the Teitan school for many years, arrived at the classroom on time with steady steps, just like always.

From the moment Takeshita Matsufumi stepped into the classroom, Lin Xiuyi's gaze was fixed on him.

He had been carefully observing the old teacher's every move, trying to find a trace of something unusual in those subtle details.

However, to his surprise, Takeshita Matsufumi's performance was flawless.

Whether it's the composure when organizing lesson plans, the fluidity when writing formulas on the blackboard, or the sternness when disciplining students, everything is exactly the same as before.

"Old ginger is spicier..." A chill ran through Lin Xiuyi's heart.

The unusual behavior of Takeshita Matsufumi in the past all told Hayashi Hideichi that he was very likely the murderer of Ichikawa.

Overnight, Ichikawa, a former high-ranking executive of the once-arrogant Shimadzu Corporation, lay motionless on the riverbank, never to be seen again.

Meanwhile, Takeshita Matsufumi, who murdered Ichikawa, was able to stand on the podium as if nothing had happened and teach as usual.

Lin Xiuyi truly admired this mental fortitude.

Just as Lin Xiuyi was lost in his own thoughts, Takeshita Matsufumi keenly noticed his absent-mindedness.

The old teacher's eyes narrowed slightly, and then he called Lin Xiuyi's name, asking him to stand up and answer the question.

This call, like a thunderclap, instantly pulled Lin Xiuyi back to reality from his world of thoughts.

He instinctively stood up, only to find his mind blank. He hadn't been paying attention at all and didn't even know what the teacher's questions were.

Sitting next to her, Eri Kisaki immediately noticed Hideaki Hayashi's predicament.

She turned slightly to the side and, in a very soft voice, quickly and clearly stated the answer.

However, unexpectedly, although Lin Xiuyi heard the answer, he still did not respond.

Upon seeing this, Takeshita Matsufumi frowned slightly, a hint of displeasure appearing on his face.

"Lin Xiuyi, you must concentrate on listening to the lecture and not keep thinking about things outside of class," the old teacher earnestly admonished. "A student's primary responsibility is to study. Other things can wait until you start working. Now is the time for you to accumulate knowledge and lay a foundation, so you must not waste it."

“…Yes,” Lin Xiuyi nodded silently.

Takeshita Matsufumi's gaze lingered on his face for two seconds, but he didn't press the matter further. He turned around and continued lecturing, as if the earlier incident had never happened.

……

When the break between classes began, the classroom suddenly became lively.

The students gathered in small groups to chat, while others hurriedly ran to the toilet.

Kogoro Mouri noticed something was off about his friend as soon as he woke up in the morning.

He turned around, put his arm around Lin Xiuyi's desk, and asked suspiciously, "What's wrong with you today? What's bothering you?"

Lin Xiuyi gently shook his head. Kogoro Mouri was a big mouth. If he told this guy his suspicions, by the afternoon, most of the school would probably know that Takeshita Matsufumi might be the murderer of Ichikawa.

"It's nothing, I'm just feeling a little unwell," Lin Xiuyi casually made up an excuse, trying to brush it off.

Kogoro Mouri squinted, clearly not quite believing it.

"Are you feeling unwell? Do you have a cold?"

On the other side, Yukiko quickly got up and reached out to touch Hayashi Shuichi's forehead.
"...If you don't have a fever, and you're really feeling unwell, why don't you go to the infirmary to rest?" "It's nothing, just a minor problem, no need to go to the infirmary," Lin Xiuyi waved her hand.

Eri, who was standing nearby, saw Lin Xiuyi's reaction.

The girl's lips moved slightly, as if she wanted to say something, but in the end she didn't.

She knew that if Lin Xiuyi was unwilling to talk about something, no amount of pressing her would make a difference.

After math class, it was time for Ms. Murakami Yui's Japanese language class.

Yui Murakami, this young, beautiful, and energetic female teacher, has always been deeply loved by her students.

However, she was in a much worse state today.

When she walked into the classroom with somewhat tired steps, her classmates couldn't help but be slightly taken aback.

Yui Murakami looked visibly listless, with large dark circles under her eyes, as if from staying up all night.

"Good morning." Murakami Yui's voice was thick with nasal tone, and before she finished speaking, she yawned widely, tears welling up in her eyes.

She hurriedly wiped it off with the back of her hand, and as she turned to flip through her textbook, the lesson plan fell to the ground with a "thud," the scattered pages still stained with coffee.

"Today we will discuss the third chapter of Snow Country."

Her movements as she bent down to pick up the lesson plan were somewhat unsteady, as if she had suddenly felt dizzy. When she opened the textbook, her finger slid across the page number three times before finding the correct position.

When it was Murakami Yui's turn to read the text aloud, her voice was sometimes fast and sometimes slow. When she read the sentence "The Milky Way poured into her pupils," she actually pronounced "poured" as "tilted," which made the students in the front row chuckle.

"Teacher, it's 'pour'," Eri Kisaki, the class's academic representative, quickly reminded her.

Yui Murakami exclaimed "Ah!" and a hint of panic flashed across her face: "Sorry, teacher, you must have misread it."

However, when she read it aloud again, her voice was still somewhat weak.

Throughout the lesson, Murakami Yui's gaze kept drifting towards the window, as if she were searching for something, or perhaps afraid of something.

When she started talking about the protagonist Ye Zi's fate, she suddenly stopped and stared blankly at the blackboard.

It wasn't until someone in the back row whispered, "Teacher, it's time to turn the page," that Murakami Yui snapped out of her daze, her cheeks flushing an unnatural red.

"Teacher, did you go on a date with your boyfriend last night?" a mischievous student joked. "You're so tired today because you stayed out too late?"

If this were any other time, Yui Murakami would have picked up a piece of chalk and pretended to throw it at him, laughing and scolding, "What does a little brat know?" The classroom atmosphere would have become more lively as a result.

But today, she just tugged at the corners of her mouth, revealing a smile that looked more like a grimace, and said in a dry voice, "Don't talk nonsense, the teacher just didn't sleep well last night."

After finishing speaking, he hurriedly turned to the next page, speaking so fast it was as if he was rushing to meet a deadline, skipping several of the most basic explanations.

Her unusual behavior aroused the curiosity and confusion of her classmates, who all speculated about what she had done last night.

Strange, Ichikawa was most likely poisoned to death by Takeshita Matsufumi at the izakaya last night.

If that's the case, then Yui Murakami shouldn't have anything to do with his death.

But what's wrong with her current state?

Did something else happen last night?

Just as Lin Xiuyi was frowning and thinking about what exactly happened last night, Murakami Yui, who was standing on the podium, suddenly swayed.

She instinctively reached out to steady herself on the table, but lost her balance and fell straight down… (End of Chapter)