When Qingyin, wearing a purple-gray dress, entered a room on the top floor of the building, the boss sitting inside, who had a cigar in his mouth and was doing calculations, was surprised and almost bit off the cigar.

The boss, middle-aged, balding, fat and sturdy, had a somewhat resolute face, with a scar on his left cheek.

"Water Nights Instructor???" The boss stood up directly, almost hitting his most cherished money bag under the table.

"Mr. Wang?" Qingyin couldn't help but wish she could find a hole to hide in! The person in front of her, Bark, was one of the bosses of the port chamber of commerce that Qingyin had previously come into contact with, and had even shown her some hospitality.

Of course, wherever a woman like Qingyin appeared, she would encounter such situations. However, with her light leather armor and a long sword at her waist, it was difficult for anyone to approach her. But now, things were different.

Wang clearly had a look in his eyes that made Qingyin extremely embarrassed. She hurriedly explained, "Please don't misunderstand, Mr. Wang! You should know about the recent incidents happening in the harbor area, the consecutive murders of prostitutes! I am currently disguising myself to investigate this matter!"

"Oh, I see. I thought you were...," Wang interrupted himself.

"What did you think?" Qingyin's gaze turned cold.

"Oh, it's nothing!" Wang said casually. "So, how can I help you, Instructor?"

Qingyin shook her head helplessly. "As you can see, I am in disguise right now to lure out the serial killer who has been murdering prostitutes!"

Wang's expression turned serious. "Instructor Water Nights, your self-sacrificing spirit is admirable, but prostitutes do have to entertain clients!"

"Huh?" Qingyin was taken aback.

"Do you really intend to play the role of a prostitute?"

Qingyin blushed and said, "Of course I won't really do that! I am just disguised for the purpose of investigation!"

"But, won't you be easily exposed like this? You don't know who the criminal is, and you can't possibly think that the criminal happens to be your first client and will expose enough evidence, right?"

"Well, what do you suggest then?"

"Hehe, if you were to pretend to be a prostitute here, without actually entertaining clients, just mix among the prostitutes and gather information, only my cooperation as the boss would make it possible!" Wang said.

"Are you willing to help me then?"

"Hahaha! Of course, Instructor Water Nights' affairs are my affairs! I will definitely assist you!" Wang laughed heartily, but then he suddenly stopped. "But..."

Qingyin was prepared for this, how could this shrewd merchant help her for no reason? She asked, "But what?"

"I also want the Instructor's help with something."

"Well, please speak."

"I have a son named Wang Pang, you should know him, he happens to be your son's classmate."

"Oh? I know him..." When Qingyin heard the name Wang Pang, her eyebrows furrowed. She had some difficulties dealing with this child...she wasn't good at handling mischievous kids! Although he was just a child, he was tall and fat, half a head taller than her!

"You know, the school is organizing an adventure summer camp soon. I don't know swordsmanship, and I have some business I can't get away from. The Instructor loves her own child, so you will accompany him, right? Can I ask the Instructor to take care of my son as well?"

"Huh?" Qingyin was taken aback. She thought that Wang was going to take advantage of her, but it turned out to be this matter. As a class parent, it was reasonable to take care of a child who had no parents with him. "Oh, if it's about this matter, no problem. I will take care of your son!"

"He always says that Auntie Water Nights is beautiful and powerful, and he wants to learn swordsmanship from you!"

Being called beautiful by a child like this didn't bother Qingyin, so she said, "Okay, I can teach him."

"Also, my son lost his mother at a young age. I hope you can treat him well and not make him feel like you treat him worse than your own child."

"You can rest assured," Qingyin said, "As long as it doesn't involve his personal safety, during this summer camp, I will prioritize everything for Wang Pang!"

Treating other people's children better than her own children in public occasions was basic etiquette, and Qingyin readily agreed.

"In that case, that's great!" Wang laughed. "I will arrange inside the brothel. You can stay there most of the time, and I will specially arrange some of my people to show you off and take you to rooms, but they won't do anything. This way, you can discreetly gather intelligence without arousing suspicion!""So, thank you very much, Mr. Wang Tun!" Qing Yin was quite satisfied with the outcome. Although it was embarrassing to pretend to be a prostitute, if they could catch the killer, they could also seek justice for the many innocent prostitutes who died tragically. Even though they were prostitutes, most of them were still pitiful women. Qing Yin felt that even if it wasn't for her own child, she should still do such a thing, after all, she had the ability to do so.

After that, Wang Pang called his subordinates to make arrangements, while Qing Yin went downstairs. She sat at the bar, not behaving flirtatiously, but naturally exuding a charm that other prostitutes couldn't compare to.

A wealthy businessman entered and immediately took a liking to Qing Yin, pointing at her and saying, "This one, I'll pay any amount!"

"Oh no! Sir, this young lady has already been reserved for today!" Lao Ya said as she pulled the businessman away to choose another girl. The businessman looked resentfully at Qing Yin but helplessly followed along.

Although Qing Yin was not accustomed to such places, her face flushed red, adding a touch of night allure.

"Hmm?" She noticed someone unusual, someone who shouldn't be here. This person seemed to deliberately avoid their surroundings and hurriedly entered the lobby, as if afraid of being recognized.

Lao Ya had seen many people like this before. After all, this wasn't a respectable place. People with status, identity, or family often came here furtively.

Understanding instantly, Lao Ya didn't shout loudly, but instead approached the person and quietly inquired, before taking them inside to choose a girl.

"Teacher Hank!" Qing Yin found it hard to believe. This person was none other than their class history teacher and class advisor, Hank! Because Hank used to be a mercenary and had some skills, he also served as the school's security officer. This summer camp was led by him and their class.

Of course, his skills were far from Qing Yin's, but this person gave Qing Yin the impression of being experienced and upright, a role model for others. How could he come to a brothel?

Suspicious!

Using a woman's intuition, Qing Yin felt that perhaps this person had some connection to the consecutive murders of prostitutes.

Unexpectedly, by exchanging the favor of taking care of Wang Tun's child, she now had the opportunity to investigate Teacher Hank more closely during the summer camp.

At that moment, Qing Yin quietly left her seat and hid in the shadows, following behind Hank and Lao Ya. She saw Hank take a blonde girl and head upstairs, and Qing Yin stealthily followed.