"Today's lesson is 'The Concept and Operation of Derivatives', which is a new knowledge, and I hope you will not be deserted during class. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ”

The clock at the top of the blackboard points to 02:00, and in the classroom of a certain class in the third year of high school, the normal teaching class is going on, and the last class will last until 3:00 in the morning.

It was pitch black outside the classroom window, and the sky was gone, along with a star and a moon.

Suddenly, huge lightning pierced through the clouds, and the sound of furious thunder and lightning resounded in the sky.

"Click!" The power supply in the school building seemed to have been cut off by lightning, and the classroom was instantly plunged into darkness.

If it were an ordinary high school, such a situation would inevitably cause the girls in the class to scream wildly.

But in the current classroom, all the students seem to be accustomed to this situation and are not moved at all.

Methodically take out the spare candle from the school bag, light it with a match and place it in the upper right corner of the table, and continue the math lesson by candlelight.

But among the dozens of students, one girl looked panicked.

It seems that she was unable to find the candle in her bag, and the girl's memory is that she ran out of candles during the last power outage, but forgot to buy them due to the next torture.

"Yu ...... Yujing! Lend me a candle...... A candle, okay? ”

The girl's facial features are pretty good in terms of appearance, but she is slightly thin and has deep dark circles under her eyes.

At the moment, he was borrowing a candle from a boy sitting at the classroom window, because in the girl's opinion, the only person who could lend her candle was this boy.

Yu Jing, who was sitting on the windowsill, was taking notes carefully when he noticed that the girl was clenching her teeth when she begged for her.

It's not a question of borrowing or not borrowing, it's a question of 'life and death'. Yu Jing looked up slightly at the teacher who was writing mathematical formulas on the blackboard, and his left hand began to quietly feel for extra candles in his school bag.

"Lend it to me...... I'll give you whatever you want, there's no class tomorrow night, I'll wait for you in the woods...... Hurry up. ”

The girl kept her voice very low, and kept using urging words to stimulate Yu Jing's speed of taking the candle, after all, every minute and every second was a matter of life and death.

Just as Yu Jing was about to take out a candle in his left hand, an inexplicable silence swept through the classroom.

All the students in the classroom buried their heads and didn't dare to make any extra movements, and Yu Jing immediately put the candle back in his schoolbag with his left hand, pretending to take notes seriously.

Out of the corner of his eye, when he glanced at the podium, the blackboard was empty.

"Yu Qiao, what are you doing?" A low, gloomy voice came.

The girl who asked for the candle from Yujing trembled when she heard the voice, and her convulsive face turned to the front of the desk.

A male head turned 180° upside down stares directly at the schoolgirl in front of him.

"I ...... I forgot to buy a candle. The girl replied in a trembling voice.

"It's not just a matter of forgetting to buy candles, right? I also want to influence Yujing, who has the best grades in our class...... You know what's going to happen, right? Yu Qiao? ”

"Give me a chance, okay? I just didn't buy candles and didn't disturb my classmates' studies. Yu Qiao's tone was already a little crazy, if it was two kinds of "torture", Yu Qiao would not be able to survive at all.

"Really? I was indeed on the pulpit just now, and I didn't see the situation in the classroom...... In this case, I'll ask the person concerned, Yu Jing, to see what he says. ”

The math teacher, who turned the head upside down, twisted his limbs so that his body was facing up, and twisted his body to crawl towards Yu Jing, who was taking notes.

"Teacher." Yu Jing saluted respectfully.

"Well, was classmate Yu Qiao deliberately influencing you just now? She looks like she's borrowing candles from you, isn't she? Think clearly before answering, otherwise even if you are my favorite student of the teacher, you will also be tormented. ”

When the math teacher asked, Yu Jing's eyes caught a glimpse of Yu Qiao, who was almost going crazy.

The girl was shaking her head frantically towards herself.

"Nope." Yu Jing replied indifferently.

"Oh? Are you sure? The math teacher's head turned around his neck, making a clicking sound of bones rubbing, and continued to confirm with Yui.

"Well, maybe Yu Qiao had such an idea, but he didn't say it, and it didn't affect me."

"Oh, I see."

The math teacher stuck out his tongue and licked it along his lips, crawling back to Yu Qiao's seat: "In that case, I will only grant you the "torture" of not carrying a candle." Two hands outstretched......"

Yu Qiao's complexion was much better, and he was already prepared for the punishment he deserved for not carrying a candle, and his left and right hands stretched out.

"This time it's a 'pointer punishment' for you."

The math teacher laughed maniacally, and ten black iron needles rolled out of his tongue.

The ten-centimeter-long iron needle was penetrated through the center of each of Yu Qiao's fingers until it was completely submerged into the base of the fingers, and the pain was indescribable.

It's just that Yu Qiao couldn't help but scream during the whole process, only the sound of blood overflowing between his fingers dripping on the ground was particularly clear in the silent classroom.

"Students, let's continue the class."

The math teacher climbed back to the podium, twisted his body and head into a normal form, and continued to explain derivatives.

Yu Qiao, whose hands were trembling, picked up the pen in a stiff posture to take notes, and at the same time wrote two words on a piece of scratch paper - thank you.

Because blood was dripping from the tips of her fingers during the writing process, the schoolgirl finally pointed the blood-stained scratch paper to Yu Jing with trembling hands to show her gratitude.

Under the candlelight, Yu Qiao showed a smile of being saved from the darkness, and this scene deeply touched the tortured Yu Jing.

"Thank you......"

…………

"Whew!"

Yu Jing suddenly sat up from the bed, and saw that the time on his watch was only half past five, and it was not yet dawn outside.

"Yu Qiao......"

In Yu Jing's somewhat faulty memory, the name of this female student suddenly appeared. A lot seems to have happened to the two during their time in high school, but Yujing doesn't remember it completely.

"I didn't expect to recall some of my memories in high school in my dreams, because of the proximity to high school, caused by the influence of the environment? Now I finally have the ability to step back here and finish all the things I didn't finish. ”

When Yu Jing simply washed up and walked out of the bathroom, Yu Xiaoxiao was sitting on the edge of the bed, staring at herself stunned.

"Who is Yu Qiao? And I have the same last name...... You were dreaming of that name last night. ”

"Is there one? One of my high school classmates, but I don't remember it very well, and I remembered it in a dream last night...... If you don't talk about it, do you want to go out to breakfast with me? This is my hometown, and I know of some particularly tasty snack bars. ”

As soon as she heard about eating, Yu Xiaoxiao immediately forgot about other things......