I suddenly became a yakuza boss.

Kazuma Kiryu, sitting in his seat, appeared very composed and patiently taught the girl next to him, who was probably in middle school. However, Goro Majima, sitting to the right of the middle school girl, was sitting casually, watching Kiryu teach.

"At the end of the 8th century, Japan moved its capital to Heian-kyo (present-day Kyoto). What system did it attempt to rebuild? And what happened because this attempt to rebuild the system failed?"

Kazuma Kiryu seems to be teaching Japanese history. Because he works as a driver in Chiba, he seems to have been exposed to a lot of historical sites in various places.

"That... is the legal system. After the capital was moved, the country fell into financial difficulties due to the collapse of the public land citizenship system."

The girl thought for a moment and then answered.

"correct."

Kiryu Kazuma said with a smile.

Surprisingly, the teaching in this group was quite formal.

"The relocation of the capital and the production system will greatly affect a country's economy and future. The decline of the Ritsuryo system later provided fertile ground for the rise of the manor economy in the 10th to 12th centuries, leading to the subsequent fragmentation of the country by daimyo. In fact, by looking at historical experiences, we can focus on the present and analyze the characteristics of the Japanese economy, which is also closely related to our own situation."

Kazuma Kiryu further illustrates the subsequent economic system reforms in Japan.

"And this question, it's almost certain to be on the test. In what year did Japan sign the Plaza Accord, and how many major countries signed the agreement that year?"

Kiryu Kazuma flipped through the documents and asked again.

The Plaza Accord of the 80s was both the golden age and the moment of downfall for Kazuma Kiryu and Goro Majima.

"this......"

This question really stumped the girl.

I don't know why, but when studying history, modern history is generally more difficult than ancient history.

Kazuma Kiryu explained, "In September 1985, the United States, France, the United Kingdom, Germany, and Japan signed the agreement together."

"Wrong, wrong."

Just then, Goro Majima heard the answer, which was different from what he remembered, and said seriously, "It was signed by the United States, Britain, France, Australia, and Japan."

"Australia?" Kiryu Kazuma asked, taken aback.

"I remember that year quite clearly. At that time, a large amount of ore was imported from Australia, and the speculation in precious metals was extremely hot. It seems that because of this, I sold too early that year and lost a lot of money. I remember that one of the countries with which I signed a major trading agreement was Australia."

Goro Majima reminisced about the past with a heavy heart.

"No, I remember it was Germany."

"Australia, you can't go wrong."

"What if Xiaoyao gets it wrong next time if you say that?"

"How could I be wrong? I remember every single thing from that year, more clearly than any other day..."

Kazuma Kiryu and Goro Majima each held their own opinions and began to argue.

After trying to figure out that both of them could barely remember, they simply had the little girl, Sawamura, open the answer key to see who was right.

As it turned out, the answer was exactly the same as what Kazuma Kiryu had given.

"......"

When Majima Goro realized that the information he had been certain of for over twenty years was actually wrong, his face quickly darkened.

He slowly pulled a short knife from his pocket and calmly prepared to perform the whole process of cutting off his little finger to atone for his sin of misleading students on the table where Kiryu Kazuma and the little girl were studying.

Is Japanese education this serious?

Li Xuan, who was hiding to the side, was shocked and thought to himself.

"Mashima, what are you doing? Put this away!"

"Oh no, Uncle Mashima's hand is bleeding!"

"Let me go! This is a necessity for education!"

Li Xuan left the area.

After walking around for a while, he suddenly felt that the confidence he had just lost as a teacher had miraculously returned.

Compared to the performance of these people, his performance was already considered competent, professional, and excellent.

※※※※

After lunch.

The afternoon study session will continue.

There were still many people studying in the library.

At that moment, Hachiman Hikigaya secretly arrived at the library alone.

If Komachi found out about this, she would definitely have another big fight with him.

But he did consult Yui Yuigahama about this.

Feeling uneasy, he roughly emailed Yui Yuigahama about what had happened that morning. This was a rare occurrence; only a girl understands a girl, and it was possible he wanted to inquire about his younger sister's well-being.

To everyone's surprise, Yui Yuigahama also thought that her sister's words were indeed very problematic.

He came straight over after noon.

"I remember Mom saying this is where Komachi studied, right...?"

Hachiman Hikigaya, weary from his journey, entered this library.

However, it was just a library, and he didn't know where to begin his search.

Just as Hachiman was looking around, he spotted Komachi's figure in a corner.

And...beside her was a tall man, clearly a young man.

What... wait a minute, who is that person next to Komachi?

Hachiman Hikigaya stared in astonishment at the scene.

With extremely turbulent feelings, Hachiman Hikigaya cautiously approached them to check on their situation.

His sister knows a boy who should be a middle school student, not an adult.

And, this young man's face doesn't look like that of a kind person at all.

"How does Komachi know someone like that...?"

Hachiman Hikigaya thought in astonishment.

Just as Hachiman approached, he heard the blond youth ask, "I told you to tell your family you weren't going home for lunch. Did you tell them properly?"

These words sent a chill down Hikigaya's spine; it turned out that this person had asked Komachi not to go back at noon.

However, Komachi replied energetically, "Yes! I already said it's fine."

As a result, the young man thoughtfully said, "This way, we can save two hours of review time."

Upon hearing this, Hachiman realized that they really were holding a study session together.

It was a false alarm, but Hachiman still didn't quite understand why Komachi wasn't studying with her classmates, but instead was studying alone with this college student-looking person in his early twenties.

No sooner had Hachiman relaxed his guard than he saw the blond-haired youth helping Komachi pour hot water. As they carried the cup to the nearby water station, while Komachi was still studying, the youth took out a packet of something and poured it into her cup.

How could the older brother possibly let such a shocking scene go unpunished!

"Hello......."

Just as Hachiman was about to stop him, Komachi, who came from the other side, squinted and complained, "What are you doing, Senpai? Did you give me that awful bitter tea again?"

"Buckwheat tea is good for the liver and eyes. Drinking it while studying will keep you from feeling irritable."

The blond-haired youth said.

Komachi seemed to dislike the drink, holding her cup and saying, "But it always has that familiar cat poop smell..."

Startled and flustered, Hachiman wondered what he was doing.

Based on this observation, it's impossible to definitively say that person had ulterior motives, but he certainly didn't trust anyone who got close to his sister. However, he wasn't the type to act indiscriminately; he hoped to draw his own conclusions through observation.

"Seriously, if you look closely, isn't this guy handsome?"

After observing carefully, Hachiman Hikigaya wondered to himself.

"Hey, my sister is only fifteen years old, she's a minor. Is it really okay for you to act like this? You're putting on such a serious face, who are you trying to fool? Speaking of which, Komachi is still not careful enough at this age. She doesn't have the ability to judge things properly. It's better to leave the tutoring to her older brother, isn't it?"

Hachiman Hikigaya thought to himself, feeling unbalanced.

His understanding of Komachi was that she was not easily fooled by a person's appearance; she was very clever.

Next, he quietly observed Komachi's every word and action, her smiles and sorrows, as if she were indeed interacting with a senior.

There was nothing intimate about it; it was all very formal and respectful.

However, he seemed very respectful, quite different from how he treated him.

Hachiman, witnessing this, felt a mix of emotions.

He's made up his mind; he won't go anywhere this afternoon, he'll just stay here and keep watch.

Protecting his younger sister is a matter of course for an older brother.

However, after standing in a secluded spot nearby and reading for over an hour, Hachiman unexpectedly saw the young man and Komachi walking one after the other towards the fire escape staircase.

Hachiman Hikigaya, putting down his book, wondered curiously, "What are those two doing over there?"

Hachiman Hikigaya, still worried, followed him.

As a result, the stairwell door was closed. The two people didn't go anywhere and stayed alone in the stairwell.

Hikigaya was so worried about his sister that his heart was pounding so hard it felt like it was going to break.

He pressed his ear against the doorway to listen to what they were doing.

However, he vaguely heard Komachi say something in a reluctant tone, which seemed quite incomprehensible.

"Senior... um, maybe we shouldn't do things like this in the library..."

These were the most terrifying words he had ever heard in his life.

PS: To be continued.