The First Lesson

　　The atmosphere in the study room suddenly became quiet.

　　The two took out their homework and placed it on the long glass table in front of the sofa. Their expressions came into focus and they started writing.

　　Sandwiched in the middle, Shinichi first saw Furuhashi on the left. Today's math homework is a small test paper with only ten questions, which is not very difficult, an average person can complete it in about 20 minutes.

　　Moreover, the first question is a matter of the most basic concepts. As long as you understand the formula and substitute the numbers, anyone can solve it easily.

　　And Furuhashi saw the problem, she immediately started writing and quickly wrote down a formula. Even though it's exactly the same as the question, maybe that means she has an idea about this type of question?

　　Shinichi couldn't help but look at her expectantly, hoping to see the incredible magic created by the beautiful handwriting.

　　Then, one second, two seconds...

　　Ten seconds passed, but the handwriting behind the formula was turned off without any movement, and the magic seemed to disappear because of this.

　　Confused in his heart, Shinichi looked at Furuhashi's face strangely, and saw a pair of big vacant eyes staring at the test paper.

　　"Furuhashi? Time to eat!"

　　"Ah...?" The soul was called back by the sound and Furuhashi's delicate body trembled, looking around, wiping her mouth, "Eat? Where can I find food… ah!"

　　Shinichi hit her on the head with his pen: "I was just wondering why there are so many blank and nonsensical answers on your exam paper now, so you spend all your time in a daze!"

　　"Wowowo, I'm sorry..." Furuhashi covered the place where she was hit with tears in her eyes, and looked at Shinichi pitifully, "I can't help it, as long as I see a number, it will be like being sucked into a cold vortex, and consciousness will wander in the gaps. between existence and non-existence…"

　　"Do not talk too much!" Shinichi pulled out a pen and paper to write down the same formula, "Your failure is purely a stress reaction caused by too many failures, and because of your quick thinking. When you think too much, it's easy to see simple things as complicated, and complicated things as messy. Now listen to me and watch me write."

　　"Oh..." Furuhashi nodded quickly, and bowed, her shoulder touched Shinichi, the strange heat she had never experienced made her heart jump, and her face flushed.

　　(No, no, no, I can't think about it right now... Concentrate on listening! I can't let down Asada-san's expectations of me!)

　　"Remember, when this formula appears, it comes with motivation to let you solve the coefficients. What is the coefficient? It's the a, b, k and other unknowns that help give X the name. So this means that this formula appears to help X find out his name, and sometimes you have to rely on his name to find out the answer... Do you know what this formula is called?"

　　"Uh... Binary quadratic equation?" Furuhashi hesitated a little.

　　"Wrong!" Shinichi said louder, "This is called the X file investigation method, which is a calculation method designed to dig up X's eighteen ancestors!"

　　"Pfft!" Furuhashi covered her mouth and turned to laugh, her shoulders slightly shaking, "I-is this easier to remember..."

　　Shinichi said angrily: "Why are you laughing! It's easier for you to remember than numbers! Don't take technical terms as a treasure trove, if you think it's weird, just add something that's easy to remember!"

　　Furuhashi stopped laughing, nodded with a confused look on her face, and returned her gaze to the formula, "If X is a boy, if the square of X is a twin, Y is a girl, Y is a sister twin..."

　　Seeing her pens wandering over the paper, Shinichi reminded them at the right time: "Give them a name, let's say this one is called Miku, and this one is called Itsuki..."

　　"Switch Miku and Itsuki into it..." Following the thoughts that gradually appeared in her mind, Furuhashi slowly wrote down one formula after another, and finally wrote down the correct answer with some hesitation.

　　"The solution appeared?"

　　Shinichi finally smiled: "Yes, congrats for overcoming the first level."

　　Furuhashi looked at her blankly, then a blush appeared on her face, and she smiled very bright and happy.

　　"Amazing! Asada-san, how did you acquire this way of understanding?! So fun and memorable, it's so childish!"

　　"I can't feel you praising me at all!" Shinichi quickly leaned back, trying to get away, "Also, this is too close! Men and women can't be near each other, Furuhashi!"

　　"Ahhhh, sorry!" Furuhashi let go of Shinichi, a bright red light shot up from her neck to the roots of her ears, and she quickly distanced herself. Turning to the other side, her sitting posture straightened and her fingers subconsciously played with the pen, and looked a little confused, "Then I will continue to do it? If there is a problem I will ask again?"

　　"Of course it doesn't matter!" Shinichi didn't dare to look at her, even his breath lessened, turned to look at Ogata, "Let me see if Ogata has a problem."

　　"Um..."

　　The two were too embarrassed to look at each other, so they just went about their own business.

　　Furuhashi continues to write her test paper, and when Shinichi leans over to Ogata, he happens to see her writing, and is surprised.

　　Is it really that great? Could it be that Ogata is smarter than Furuhashi, and can finish homework without his interference?

　　Taking a closer look, it is true that her literary homework is relatively free. There is no right answer to a short question. As long as the writing makes sense, it can't be counted wrong. No wonder she wrote so quickly.

　　Homework is to give articles first – paragraphs from Natsume Soseki and then provide topics for students to develop freely.

　　The first question is: "Why does the writer say, 'People's praise and criticism vary from time to time and from place to place, just like my eyeballs can change. My eyeballs are just big and small, but the world's comments are confusing. Black and white doesn't matter, because everything has two sides."

　　Then Ogata wrote:

　　"Because it's a cat. The structure of a cat's eye is similar to that of a camera. When light passes through the pupil and passes through the lens foil to the retina, the photoreceptor cells in the retina are stimulated by light to produce stimuli that are transmitted to the brain via the optic nerve to produce vision..."

　　"Wait! No one asked you to answer biology knowledge!"

　　Ogata was forced to stop writing, and raised her eyes to look at Shinichi in surprise.

　　"Then what's the answer? Doesn't that mean her eyeballs are big and small? The main character should be a cat."

　　"It's just a metaphor, using cat eyeballs as a metaphor to change people's hearts..."

　　"I don't understand." Ogata shook her head frankly, and said softly, "What does he want to say, what does he want me to answer, why doesn't he say those words frankly... I don't see it, I don't know how to feel it."

　　Shinichi looked at the delicate little face that was colored with disappointment, as if the robot was troubled by not understanding human emotions, he couldn't help pondering for a few seconds, having some teaching plans in his mind.

　　Then, he took a pencil and drew a circle on Ogata's exam paper.

　　"Ogata, do you know the rules of the questions?"

　　"Rule?" Ogata was stunned for a moment, then tilted her head "Does that mean the possibility of how Sensei will ask questions?"

　　"Right, many people would use the data method to guess the topics of the midterms, finals, and even the finals. If you can gather enough information in the future, you might be able to calculate the range of topics yourself. But the problem now is not this."

　　After Shinichi finished drawing, circles appeared all over the articles and questions, which were divided into very clear blocks.

　　"In high school exams, whether it's Japanese or English, there are rules. Questions are written in the order of the article."

　　He picked up the pen and explained earnestly: "For example, the first question, it gives you the sentences in the article for you to think about, then draws the sentences in the article out of reach, and makes paragraphs before and after. Seventy to eighty percent is inside!"

　　As if seeing something new, Ogata's eyes widened slightly, pointed at the marked part and said: "Just hold both ends, rotate your hand over the same thing, and turn it over. It is a human skill to achieve change?"

　　Shinichi smiled and nodded: "Basically true. Of course, to simplify things, it would be better to write "The human heart is more complicated than a cat's eyeball, black and white are indistinguishable."

　　Ogata, who was still a little excited, was confused again, and her face contorted: "...Why did it become like this after simplifying?"

　　"You don't need to understand this for now. The most important thing now is to find the answer!" Shinichi combed her hair, tapping into Ogata's deep thoughts, and succeeding, fulfilling the wish he had suppressed, and couldn't help but reveal a satisfied smile, "You can earn points for writing short answer questions like this. For multiple choice questions, try to find options with similar meanings and similar words."

　　"So that's it, I've been taught." Ogata nodded earnestly, as if she had remembered it deeply in her heart, but then raised her face and looked at him with a calm and displeased expression, "Apart from that, please don't rub my head casually, it would bother me a lot. "

　　"Ahaha, sorry, it's just..." Shinichi withdrew his hand with a dry smile, and looked away.

　　Ogata lowered her head, and silently looked at the blocks on homework that had been divided one by one, clearly marked the topic position and the corresponding article area, and even wrote a few small notes on it.

　　With a slight movement in her heart, she placed her hand on top of her head, and caressed the place he had just touched. Her fingers twirled quietly, then combed it slowly as if styling her hair.

　　Finally, the corners of the mouth are slightly curved, and the eyes look through the lens, focusing more on the exam question in front of her.