Brother! This is the adoption certificate. I don't want your sister-in-law!

Su Xiao has never been interested in studying.

If it didn't exist in my past life, it wouldn't have existed in this one anyway.

But in my past life, I suffered too much from a lack of education.

Only then did he realize that life would eventually reclaim the textbooks he had owed back then, with interest, and not a penny less.

So when Su Wan Ning pushed the draft paper over, he didn't yawn like he did in his previous life.

He took it and looked at the neatly drawn circles, intersections, unions, and complements, with fine notes next to them.

Su Wanning looked very serious when explaining the problem, unlike her usual cold and indifferent self; she seemed like a proper little teacher.

He remembered that in his previous life, it was the same in the living room. Su Wan Ning was explaining a problem to him, but he ignored her and only thought about going out to go online.

"Did you understand?" Su Wan Ning looked up at him.

Su Xiao picked up her pen and wrote a crooked "A∪B" on the draft paper.

"Say it again, I didn't remember this symbol earlier."

Su Wanning glanced at him, then lowered her head again to draw circles.

He calculated step by step, slowly, but he wrote out each problem himself.

The draft paper was quickly covered with equations, some correct and some incorrect, but none were blank.

As Su Wanning continued speaking, she gradually realized it.

His foundation was even worse than she thought.

When discussing the complement, he confused the universal set with the union of sets, and his calculated answer was completely off-target.

He stared at the draft paper for a long time, then silently erased it and started over.

She didn't rush him.

Every time he got stuck, she would stop, flip back to the example problem on the previous page, explain it again, and only move on when he caught up.

The sound of the pen tip touching the draft paper was very soft; the only sounds in the living room were the turning of pages and the occasional passing car outside the window.

He listened until very late that night.

He understood some parts, but not others, but he never put down his pen from beginning to end.

The next morning, it was Su Wan Ning who knocked on the door again.

Su Xiao groggily got out of bed, squinted, and walked to the living room, where breakfast was already laid out on the dining table.

Plain congee, fried egg, and a small dish of pickles.

The fried egg was still runny, and the porridge was at the perfect temperature.

He had just picked up his chopsticks when a notebook was handed to him.

The cover is made of kraft paper, and there is a small number written in the lower right corner.

Su Wan Ning had already changed into her school uniform, carrying a backpack and holding a water bottle; she was clearly waiting for him to finish eating and leave.

"This book contains my summary of formulas and basic concepts. It covers sets, inequalities, and basic functions. Read this book first and memorize everything. Then do the practice problems."

Su Xiao took the notebook and opened it to the first page. It was filled with densely packed mathematical formulas.

The Venn diagram of the set is marked with two red circles, and the intersection is marked with a diagonal line.

The definition was marked next to it with a blue ballpoint pen. The handwriting wasn't the cute, rounded style; it was regular script, with straight lines and even strokes.

Before he had even finished reading the first page, an image of another notebook had already reflexively popped into his mind.

Xu Niannian's book, the chemistry one.

His head instantly became twice as big.

A chemistry notebook and a math notebook.

One book was still untouched in his bag, while the other was still warm when it was handed to him.

In his entire life, no, in both his lives combined, he had never had such close contact with a laptop.

Su Wanning stood in front of him, her gaze cold.

Su Xiao quickly closed the notebook, stuffed it into her bag, and looked as serious and earnest as if she were receiving some sacred mission.

"Don't worry, I will definitely memorize it. Give me three days, no, two days. I'll memorize it all within two days."

Su Wanning did not speak.

Her expression clearly said five words: "You'd be a fool to believe me."

"Next monthly exam," she said, placing her water bottle on the table and tugging at her backpack strap, her tone as if stating an unalterable administrative order, "If your grades don't improve by then, I won't make you breakfast anymore."

Su Xiao's smile froze instantly.

He looked down at the fried egg on the table; the runny yolk was still wobbling slightly, and the pickled vegetables were finely chopped and neatly arranged in a small dish.

No.

What does he eat if there's no breakfast?

Go to the food street to buy it? He couldn't bear to spend the money.

Make it yourself?

He almost cut off his finger while cutting beef last time.

Instant noodles? If he ate instant noodles every day, he'd turn into a mummy.

"Wan Ning." He put on a smile, his tone clearly ingratiating, "Let's discuss breakfast again..."

Su Wanning had already reached the door.

"No, you see how bad my foundation is, it takes time to improve..."

Su Wanning lowered her head to change her shoes.

He put down his chopsticks, stood up from the dining table, and chased after her to the entryway. He braced one hand on the shoe cabinet and gestured with the other, trying to win her over.

"Last month I was eighth from the bottom in the whole grade. Even if I improve to eighteenth from the bottom this time, that's still progress, right?"

Could you be any more shameless?

Su Wan Ning glanced at him, tied her shoelaces, opened the door, and walked out without looking back.

Su Xiao stood in the entryway, watching her ponytail flash and disappear at the top of the stairs.

He looked down at his bare feet, then looked back at the untouched breakfast on the table.

There's absolutely no way out.

Su Xiao arrived at school relatively early.

The morning reading session hadn't started yet, and there were only a few students scattered in the corridor carrying breakfast and hurrying to the classroom. The classroom was less than half full.

He pushed open the back door and saw that Xu Niannian was already sitting in her seat.

She lowered her head, holding a white steamed bun in both hands, taking small bites.

It takes a long time to chew a bite, and after finishing chewing, it lowers its head to take another bite, its cheeks bulging, and it moves like a hamster stuffing sunflower seeds into its mouth.

There was a cup on the table, which probably contained plain water.

There was also a small bag of pickled vegetables in a plastic bag, half of which had already been eaten.

She ate very carefully and attentively, supporting the steamed bun with her other hand to catch any crumbs that fell.

Hearing footsteps, Xu Niannian looked up at him, then quickly lowered her head again, her chin almost touching her chest.

He put the steamed bun down and placed it next to the cup.

She seemed unsure whether she should continue eating; she pinched the edge of the steamed bun with her fingers, took a small piece off, and then put it back.

Su Xiao put down her schoolbag and plopped down next to her.

The sound of the chair legs scraping against the floor was particularly jarring in the quiet classroom, and Xu Niannian's body shrank slightly at the noise.

He glanced at the things on her table.

Steamed buns, boiled water, and half a bag of pickled vegetables.

I glanced into her desk drawer again and saw a plastic bag with a few steamed buns inside.

He thought about it and realized that every time he saw her eating breakfast, it was always the same thing.

White steamed buns, pickled vegetables, and plain boiled water.

Occasionally, the pickled vegetables will be replaced with chili sauce.

"Is this all you eat every day?"

Xu Niannian quickly swallowed the mouthful of steamed bun in her mouth, as if letting him see her eating was something shameful.

Her throat moved, probably because she swallowed too quickly. She blinked her eyes, then blinked again, before finally swallowing.

Then she whispered, "This is delicious."

Su Xiao didn't say anything.

He looked at the enamel mug that belonged to Xu Niannian on the table.

A small piece of enamel has been chipped off the rim of the cup, revealing the grayish-black iron underneath.

The pickled vegetables were packed in a plastic bag, and the bag was tied tightly with a rubber band.

Delicious? He didn't believe it.

The steamed buns looked like they were from yesterday; they were a bit dry today, and the crust had hardened slightly.

She has to nibble at it in small bites, otherwise she won't be able to chew it.

He didn't call her out on it.

He opened his schoolbag, wanting to take out the two notebooks inside before morning reading.

One math book by Su Wanning, and one chemistry book by Xu Niannian.

I have to at least look through it first, otherwise I'll get another cold shoulder from my sister during my tutoring session tonight.

He unzipped his backpack and reached inside to touch his notebook.

My fingertip touched something.

He was taken aback, then took the thing out.

It is a bottle of milk.

He recognized him.

He bought this specifically for Su Wan Ning when he went to the supermarket last time. He bought a whole case and puts a bottle on the dining table for her every morning.

She never drank in front of him, so he couldn't tell whether she had drunk it or not.

As a result, she put a bottle in her schoolbag today.

I guess he thinks he needs to drink milk to boost his brainpower while studying?

He held the milk in his hand and looked at it for a few seconds.

Then he looked up and saw Xu Niannian carefully breaking the steamed bun into small pieces next to him.

He put the milk on her table.

"For you."