My sister is Luna

Martial arts classroom.

This is an open space with good ventilation. Two rows of specially made wooden stakes stand on both sides. Several flags hang under the eaves, with the emblem of martial arts disciplines painted on them. The emblems resemble two fists drawing ripples on the water, symbolizing the combination of strength and gentleness, and the cultivation of both mind and body, reflecting the profound philosophical ideas contained in martial arts.

Many students have already gathered here, mostly boys and a small number of girls, which has caused a serious gender imbalance in this course. But that's to be expected, since close combat is the most unavoidable aspect of martial arts battles. Absorbing the energy of heaven and earth, unleashing the limits of the human body, and delivering punches to the flesh is the romance of men, which may be fatally attractive to the former.

They stood in their martial arts school uniforms, chatting as they waited for their teacher to start class. Their vibrant energy and youthful vitality were on full display.

There are no seats here. Practicing martial arts doesn't require sitting down to listen to lectures. A healthy body is what you need to learn this subject. Martial arts are learned and understood through combat.

"The main character makes a dazzling appearance~!"

Suddenly, a boy jumped out, opening his arms as if to welcome countless warm embraces. His loud voice echoed throughout the martial arts classroom, drawing everyone's attention to him.

Having attracted everyone's attention, he glanced around, nodded in satisfaction, and skillfully made a single-finger-to-the-sky gesture, saying smugly:

"All those starry-eyed eyes are waiting for one star—that star is me!"

"Hey, Yao, you're acting like a chuunibyou again. When are you going to be normal?"

Someone spoke up, chuckling. Yao always appeared in this kind of childish and immature manner, which always made people feel both amused and helpless.

“How can you call someone a genius ‘chuunibyou’? That’s a famous quote. And even if you’re going to call me a chuunibyou, you have to change the ‘2’ to the ‘1’. ‘Chuunibyou’ sounds much better, right? That’s the charm of language.” Yao flicked his hair, inadvertently revealing the cross-shaped scar on his right forehead, and chuckled.

"That's ridiculous. Everyone here is a genius, so does that mean everything we say is a famous saying?" someone retorted, feeling puzzled.

"No, no, no..." Yao said with an expression that said, "You're still too young and naive."

“When everyone is a genius, there is no such thing as a genius. Instead, everyone becomes an ordinary mortal on equal terms. But I am still a genius. Yes, you can call me a genius among geniuses.”

"Hahaha, I am a genius among geniuses!"

Yao covered his cheek with one hand, his bright eyes peeking out from between his wide-open fingers, exuding a strong sense of adolescent chuunibyou (adolescent delusions of grandeur).

"Hmph..." A white-haired girl with short, neat hair snorted coldly in the crowd and gave Yao a cold look.

"You bastard, don't get too cocky. There's a limit to how much you can show off!" A fat man, annoyed by Yao's arrogance and his tendency to belittle others to elevate himself, said angrily.

"I wasn't trying to look cool. Some things are just innate," Yao said quite seriously, with a hint of melancholy in his eyes, as if the world didn't understand him.

"I really can't stand it anymore!" Seeing that Yao hadn't listened to him, the fat man's eyes were filled with anger, and he reached out his big hand to Yao, wanting to teach him a lesson.

"Hey, I'm behind you~" Just as the big hand reached for Yao, he slid to the side, curving around to behind the fat man, and patted him on the shoulder.

The fat man was momentarily enraged and turned around to grab him.

"Cough cough." At this moment, a cough sounded, exceptionally clear, as if it had fallen into everyone's ears. Instantly, everyone looked over and saw the white-haired youth who had just entered the martial arts classroom.

"Hello, students." Cain greeted them with a smile as he saw the students gathering around him.

"You are..." Yao said with some confusion.

"Oh, I forgot to introduce myself. My name is Cain, and I'll be teaching this martial arts class. I'll be spending some time with you all, so please take care of me." Cain looked at each of you and gave you a perfectly appropriate and friendly smile.

"Huh? A new teacher came today? She's so young, she doesn't seem to be much older than us."

"Yeah, yeah, and he's so handsome..."

"How will he teach us? Will it be interesting?"

The students were very curious about Cain, their new teacher, and they discussed it amongst themselves, speculating about what made him stand out.

The teachers at Jixia Academy are both students and teachers. The standard for becoming a teacher is "the most accomplished first." For example, the Three Sages are the most advanced people in the three fields of magic, martial arts, and organization. They are the teachers of all teachers and students. People who are advanced in a certain field can apply to become teachers. Everything depends on your knowledge and ability. Therefore, Jixia Academy has a strong academic atmosphere.

"Ahem, please be quiet, everyone. Let me call out your names first."

Cain spoke, his calm voice drowning out everyone else's; he still possessed the skill of amplifying his voice by concentrating his strength in his throat.

The crowd immediately fell silent, and began to line up on their own, their faces showing surprise and anticipation for the lesson to begin.

Cain took the list and began reading it aloud.

"Ji Xiaoman, Ji Xiaoman...?" Cain repeated the first name several times, but no one answered.

"Teacher, Ji Xiaoman said she went to help a teacher," a student said, raising their hand.

"I see. Okay, next one." Cain believed him and continued reading.

The names were read out quickly, and everyone except Ji Xiaoman was present.

"It's a pity we'll have to see Ji Xiaoman next class. Let's begin the lesson." Cain looked at the group and smiled with satisfaction.

"Martial arts involve absorbing the energy of heaven and earth to strengthen oneself. Since we live in this world, we must experience its energy to embark on the path to becoming stronger." Cain began speaking, reciting the script he had memorized.

"Now, two people will practice sparring together. Let's start by practicing the first set of punches together and see what you can feel."

"Huh?" Everyone was stunned for a moment. Such an ordinary opening? But they still did as instructed and divided themselves into teams.

"Come on, let's begin, starting stance..."

"You did a great job, but why do you all look so distressed?"

Cain nodded in satisfaction. The students all did it very skillfully and perfectly, but their expressions were a little strange. He couldn't help but ask in confusion.

"Hey teacher, this is so boring. We've known this stuff for ages, we're so familiar with it. It feels like you're just being perfunctory," Yao, who was standing at the front, said.

"Ah? Is that so?" Cain was secretly surprised, but said calmly.

“Yes, Master Fu’s lessons are not boring at all…” the other students chimed in.

“Since that’s the case, then I’ll take it seriously. You’re all geniuses, and this is my first time teaching. Teaching you superficial things won’t be of much help, will it? What I’m going to teach you now is…” Cain pondered for a moment and then said:

"experience."

"Experience?" The students all looked puzzled and curious, as this seemed different from the teacher's teaching style.

“That’s right, real combat experience, not the petty sparring you guys do. The Return to the Void Dream Competition is coming up in a few days, isn’t it? Teaching you this might increase your chances of making it to the finals.”

These students will eventually leave the academy and make their own way in the world, so fighting will inevitably be necessary. In his eyes, the fights between the students in the academy are not really fighting, but just playing around. Passing on his experience fighting on the Great Wall to them can be considered as providing them with a reference for their future.

This moment made everyone take it seriously and become attentive.

“Let’s find someone to demonstrate, so who should go first?” Cain asked.

“Me!” Yao eagerly raised his hand and said.

"Okay, you're the one. Your name is Yao, right?" Cain looked at Yao, who used to be the most talkative in the game.

“That’s right, teacher, I’m going to be the one to win first place in the Return to Emptiness Dream Competition,” Yao said, blinking.

"You attack me first."

"Then be careful, teacher." With that, Yao drew his long sword from his waist, moved in a curve to Cain's back, and then circled around to Cain's front.

"Take this! Take this! Take this!" Yao kept circling around Cain, brandishing his longsword in a flashy manner while constantly talking.

"Hey~ Take this!" Yao wore a smug smile; even his teacher must have been astonished by his formidable swordsmanship...

"Ding--"

The crisp sound of weapons clashing.

With a single, precise strike, Cain knocked the longsword from Yao's still-spinning hand.

Yao was stunned for a moment, and his steps were also tripped, causing him to fall down.

He scratched his head and sat on the floor, looking at Cain with a somewhat blank expression.

"There are too many unnecessary moves in your swordplay. It's not simple and concise enough, and it seems cumbersome and tedious. If this were a real battle, you would have died ten times over," Cain said calmly.

Cain drew his sword and cleaved a wooden stake beside him with a smooth cut, his movements swift and decisive, simple yet awe-inspiring.

"Real battles don't have many fancy moves; they're just a struggle between life and death. You could say it's the most basic kind of battle. Every move is deadly. Hesitation means defeat, decisiveness means certain death. You have to keep your mind clear at all times..."

Cain spoke seriously, and at that moment he seemed to have opened a floodgate of words, speaking in a way that went from simple to complex, and using gestures to make his words even easier to understand.

At that moment, the students realized that the new teacher, Cain, was quite capable, and they began to take it seriously, absorbing the knowledge of the battle while listening to the lecture and thinking about it.

When encountering something they don't understand, they will ask questions, and Cain will personally help them solve the problems. Practice is the best way to gain experience. Although it may be painful, it makes people more insightful and beneficial.

Cain's unique teaching style quickly began to attract the attention of other students.

……