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

Classroom of Grade 11, Class 12.

Su Xiao was wearing a light pink sweatshirt, with the sleeves deliberately rolled up to her elbows. She rested her arms on the desk and leaned her body towards Xu Niannian.

"See that?"

He waved the clothes in front of Xu Niannian, the fabric almost brushing against the tip of her pen. "Wear it, are you satisfied?"

Xu Niannian lowered her head, her face turning red from her ears down, but the corners of her mouth secretly curved slightly.

She stared at her textbook without looking up, her fingers gripping the pen slightly.

Just as Su Xiao was about to tease her a couple more times, her phone suddenly vibrated in her pocket.

Unknown number.

He hesitated for a moment, then answered the call.

Su Wan Ning's voice came from the other end of the phone; it was very calm, and no emotion could be detected.

"Come to my office."

Su Xiao's smile vanished.

"Whose phone is this? What's wrong with you?"

You'll see when you get here.

The phone hangs up.

Su Xiao immediately stood up.

Xu Niannian looked up at him and saw his strong reaction, with worry in her eyes.

"What's wrong?"

"It's nothing, I'm just going to my office."

As Su Xiao walked out of the classroom, Fang Yu called out from behind, "Brother Su, where are you going?" He didn't turn around.

Pushing open the office door, the first person you see is He Shaojun.

He Shaojun leaned back in his chair, his expression complex. He paused for a moment when he saw him come in.

No, I haven't even looked for you yet, so why did you come to my door on your own?

The second person I saw was Liu Lan, sitting behind her desk with her arms crossed over her chest. Her gaze behind her gold-rimmed glasses was as cold as a knife in winter.

The third person I saw was Su Wanning, standing in front of Liu Lan's desk, head down, her ponytail hanging down her shoulders.

Her back was quiet, but her shoulders were slightly hunched forward.

Su Xiao frowned slightly.

He walked over and stood next to Su Wanning.

He didn't look at her, but there was less than a fist's distance between their shoulders.

Liu Lan looked him up and down.

He was tall and thin, with a roguish look on his face, and his whole demeanor exuded a carefree and irresponsible vibe.

Her brows furrowed even more.

"Su Xiao, what are you doing here?"

Before he could speak, Liu Lan sneered again and tapped the table.

"Fine, since you're already here, I'll just tell you straight, so Old He won't have to come looking for you. I saw Su Wanning helping you fix your clothes and hair this morning at the school gate. The two of you being all lovey-dovey at the school gate, what kind of behavior is that?"

Su Xiao was stunned for a moment.

He turned to look at Su Wanning, and Su Wanning looked up at him as well. They stared at each other for a second.

Su Wanning shrugged helplessly.

Su Xiao immediately turned her head and looked at Liu Lan.

"Teacher, you've misunderstood."

"Misunderstanding?" Liu Lan sneered. "I saw it with my own eyes, what misunderstanding could there be?"

Su Xiao took a deep breath, her voice not loud, but every word was clear.

"Su Wanning is my sister."

The office fell silent.

Liu Lan was stunned for a moment.

He Shaojun sat up abruptly, his eyes widening.

Su Wan Ning stood to the side, her lips pursed, her face slightly flushed.

Liu Lan was so angry she laughed. She turned to He Shaojun and said sarcastically, "Old He, it seems that Su Xiao from your class is not only bad at studying, but also bad at character. When something happens, he doesn't dare to take responsibility. He just wants to use 'little sister' to completely absolve Wan Ning from our class. What a scumbag!"

Su Wan Ning's eyes widened instantly upon hearing this, and Su Xiao Ren was also dumbfounded.

No, what about trust? Does my word not have any credibility?

Do I look that much like a jerk?

Can't Su Wan Ning be my sister?

He Shaojun coughed awkwardly, stood up, and said, "Su Xiao, if you talked, you talked; if you didn't, you didn't. Stop with the brother-sister stuff. A man should be responsible. How can we entrust Wan Ning to you like this?"

"He Shaojun, what are you saying!"

Liu Lan slammed her hand on the table, startling everyone. Her eyes widened in anger. "I can see that you're holding a grudge against me for taking your senior teacher spot last time, and you deliberately sent a hoodlum to ruin Wan Ning's class."

"I didn't say that, don't wrong me."

That's exactly what you mean!

"You even stole my 'Three Good Youth' award when you were in college!" He Shaojun glared at him.

"You're talking nonsense! With your GPA and credits back in school, did you even deserve to be called a 'Three Good Youth'? Old He, I never expected you to be so petty. No wonder no woman married you..."

"Then I deserve to have no man marry you!"

Seeing the two suddenly start arguing, Su Xiao and Su Wan Ning were both dumbfounded, staring at each other with wide eyes.

No, you two are really dating, aren't you?

Seeing that the two were getting more and more heated and were about to overturn the office, Su Xiao couldn't help but cough and tap the table to interrupt them.

"Teachers, please stop arguing! Su Wan Ning is really just my sister, the kind we're related by blood!"

Upon hearing this, He Shaojun and Liu Lan simultaneously stopped their argument, turned around abruptly, and spoke in unison.

"What did you say?"

Su Wan Ning pursed her lips, while Su Xiao spoke loudly from the side.

"Su Wanning is my sister, my biological sister."

Su Xiao's tone was calm. "She helped me tidy my clothes this morning because I couldn't even put my school uniform on properly. She's not my girlfriend, she's my sister. Teacher, did you hear me clearly? Stop being so suspicious."

The office fell silent again.

He Shaojun recovered from his shock.

He coughed and looked at Liu Lan: "Um... I remember that the household registration book in the enrollment information says that Su Xiao does have a younger sister..."

Liu Lan's expression changed.

Her lips moved as if she wanted to say something, but nothing came out.

Her gaze swept back and forth between Su Xiao and Su Wan Ning several times.

She was completely dumbfounded.

How could these two be siblings?

She is so beautiful, quiet, and has good grades; she is a model student at No. 1 High School.

The other one... well, let's not talk about it.

If you stand at the school gate, people will think you're in a movie set in Crows Zero.

Su Xiao stood there, calmly looking at Liu Lan.

Su Wanning stood next to him, her shoulder resting against his.

Neither of them flinched.

Liu Lan slowly sat back in her chair and tapped her fingers twice on the table.

After a long while, she spoke, her voice much softer than before.

"Su Wanning, is what he said true?"

Su Wanning nodded.

"He is my brother."

Liu Lan remained silent for a long time.

Then she sighed, never expecting it to turn out this way.

"Alright, this time the teacher made a mistake. The teacher apologizes to you. You can go back now."

Su Xiao did not leave immediately.

He looked at Liu Lan, his voice calm: "Ms. Liu, my grades aren't good, and I accept the punishments, warnings, fighting, and truancy. But my sister is in the top three of the grade; she achieved that through her own hard work. I hope you won't have a bad impression of Wan Ning because of me, thank you!"

After saying that, he turned and walked out.

Liu Lan was stunned on the spot, never expecting that such words would come from the mouth of a delinquent student.

"goodbye teacher."

Su Wanning also spoke up, and the two of them walked out of the office one after the other.

He Shaojun sat in the chair, watching Su Xiao's back, and it took him a long time to come back to his senses.

He stroked his chin and muttered to himself, "When did this kid become so reliable..."

Liu Lan glanced at him, pursed her lips, and said, "Of course, he's more like a man than you."

He Shaojun was so angry that his lungs ached.

But it took He Shaojun a while to realize what was happening.

"Holy crap, who did Su Wan Ning call just now? Where did this kid get a phone?!"

……

In the corridor, Su Xiao walked in front, and Su Wan Ning walked behind.

After walking a few steps, Su Xiao stopped and turned around.

Su Wanning also stopped and lowered her head.

Su Xiao looked at her and softened her voice.

"It's alright, let's go."

Su Wan Ning looked up at him, her lips moving slightly.

"Thanks."

The sound was very soft, almost inaudible.

Su Xiao laughed, "What are you thanking me for? I'm your brother. This was just a misunderstanding, and it's all cleared up now."

He reached out and gently patted her on the head.

This time, Su Wanning didn't dodge.

She lowered her head, and the tips of her ears turned red.