"This problem should be solved using this formula." The boy picked up his pen again and solved the last big problem for her.

She listened attentively. The boy's voice was gentle and unhurried, and he explained the problem in a way that was both profound and easy to understand. She seemed to be able to understand him.

Whether it's her brother or Tuantuan, they always speak so simply, as if they should be able to understand in just a few words, but she just doesn't understand. Especially her brother, who has no patience for her at all, and Tuantuan sometimes inadvertently gives her the look that she's stupid.

Xiao Chun is better; she's attentive and patient. However, Xiao Chun said that she has a lot of homework lately and can't teach her anymore.

Xuanxuan's older brother didn't attend the same junior high school as them; he went to a public boarding school.

"Come on, use what I just said to do this problem." The boy picked out a similar problem from her math homework and pointed to it.

She lowered her head and started writing on the draft. Halfway through, she encountered some difficulties and began to struggle with her writing, so she bit the end of her pen and racked her brains.

"Here it is, put yourself in..." the boy explained to her again.

"Ah, I understand." She lowered her head and quickly wrote, then timidly asked the boy after arriving at the answer, "Did I get it right?"

"Yes, that's right." The boy smiled and added, "Actually, you don't need to be afraid of making mistakes. If you make a mistake, you can correct it, and the impression will be even more profound."

"Really?" Luo Xikui thought that if Tuantuan saw her make the same mistake a second time, she would hit her on the head with a pen and say that she was stupid.

"Just do it without worry." The boy then bent down and taught her a few more problems.

Luo Xikui listened attentively, focusing all her attention on the questions. She was so engrossed in the lesson that she found it easier than usual, and math no longer seemed so dreadful.

After finishing her math homework, she looked up and twisted her neck, only to find that it was already completely dark; it was eight o'clock.

"It's getting late, I have to go back." She packed her pencil case and put her homework and test papers into her schoolbag.

The boy pushed open the door, letting her go out first, and then followed her out.

When they reached the curb, she turned to the boy and said, "Thank you for today."

"I should be thanking you," the boy smiled.

Luo Xikui was slightly taken aback. Under the neon lights, the boy with red lips and white teeth smiled so beautifully, like a gentle spring breeze.

"How can I pay you back?" the young man asked with a faint smile.

Luo Xikui snapped out of her daze, shook her head, and said, "No need, just consider it as tutoring fees."

She hailed a taxi, opened the back seat, and got in.

Before the boy could say anything more, the taxi started moving, and a slender arm reached out from the window and waved gracefully.

He smiled and walked to the bus stop, then got on the bus.

Luo Xikui arrived home at 8:30. Her mother had recently gone abroad for photography, and her doting father had gone with her. Her two younger brothers were staying at their grandparents' house, so no one came to question her about why she was late.

"Oh, so you're sneaking a bite in the kitchen." A rough, hoarse voice rang out from the kitchen doorway.

Luo Xikui, who was eating rice with sauce, coughed and looked up to see Xiang Hengxi wearing a jersey. She glared at him and said, "What do you mean by stealing food? I'm eating openly and honestly, okay?"

"Didn't you go to Ayu's house for tutoring? Didn't Aunt Ni give you any food?" Xiang Hengxi walked into the kitchen, opened the refrigerator, and took out some water to drink.

Luo Xikui lowered her head to eat, and mumbled, "I'm still developing, can't I eat more?"

Xiang Hengxi coughed, glanced at his younger sister's chest, and laughed, "Are you going to turn your flat chest into a little hill?"