When they rushed to the piano room, they found that there was more than one person inside, and Yu Quanyuanxin was also in the room.

He looked like he was looking for something, very seriously, so much so that Yuquan Yuanxin didn't stand up in a panic until Matsuda Jinpei deliberately coughed twice. His smile was a little awkward: "What a coincidence, I dropped something here, come and look for it."

Conan took the lead, smiling innocently, which gave Matsuda Jinpei a headache: "Huh? But uncle was only at the door just now, could that thing run away?"

Yu Quanyuan replied in a dry voice: "Ah, yes, yes, it will roll."

"What is it? Do you want us to help you look for it?" Saikawa Gen said sincerely, "It must be hard to find such a big room. It will be faster if more people help."

Yu Quanyuan smiled dryly and said, "No, that's not necessary! I'll come back tomorrow!"

He said goodbye to a few people, but was stopped at the door by Matsuda Jinpei. Matsuda Jinpei stared at him expressionlessly, which made him feel uneasy and he couldn't help but take a few steps back.

Matsuda Jinpei locked the door and gave a stiff smile: "Don't leave in a hurry. Tell me everything you know."

It's very scary. Not only the man in front of him who exudes the aura of a boss who is not easy to mess with, but also the smiling young man on the side is scary. Even the little boy with an innocent smile and the little girl with an expressionless face give people a weird feeling that makes their scalps tingle.

Even world-class competitions couldn't give him this kind of palpitating feeling.

Yu Quanyuanxin swallowed unconsciously as he was pushed to the piano by four children who were much younger than him but were full of pressure, until he could no longer retreat.

Qichuan Yuan smiled and said, "Since your matter has been put aside for the time being, Mr. Yuquan Yuanxin would not mind answering a few questions for us, right?"

"No problem. Okay." Qichuan Yuan nodded with a smile. He ignored Yuquan Yuanxin who looked gloomy and said to himself, "First question, Mr. Yuquan Yuanxin knows both Ms. Kobayakawa and Ms. Mori Nana, right?"

I minded, but for some reason Yu Quanyuanxin didn't dare to say it out loud. He glanced at the man in a black suit standing on the side who looked unpleasant, and said, "I don't know him."

"Really?" Huihara Ai stood aside with her arms clasped across her chest, "But your eyes are lying. If you are not feeling guilty, there is no need for your eyes to wander."

His scalp was tingling, and the muscles on Yu Quanyuanxin's face twitched. "I know him, but I'm not familiar with him."

Qichuan Yuan nodded and continued to smile: "Yuquan Yuanxin should also know who Miss Kobayakawa is talking about, right?"

Yu Quanyuanxin's pupils shrank sharply, and his breathing stopped for a moment. He shook his head: "I don't know."

Qichuan Yuan's smile remained unchanged, but his eyes became increasingly cold, like a sharp sword shooting out, making people tremble with fear. Seeing this, Yu Quanyuanxin was inexplicably frightened, and said in a low voice, "I know."

As expected, Gin's eyes were very useful. Qichuan Yuan's eyes were filled with smiles again, and his voice was so gentle that Yuquan Yuanxin felt a little distressed. "Please let Mr. Yuquan Yuanxin speak for a moment. Is that okay?"

There is a problem. What do you want to do by interrogating prisoners like this? I am not a criminal!

Unfortunately, he didn't dare to say it out loud. Yu Quanyuan smiled dryly and said, "No problem."

He sighed, "Actually, Jiang Zi, Mori Nana and I are friends."

Conan: "Friend? But Ms. Mori Nana seems very unfamiliar with you."

"Oh," Yu Quanyuanxin sneered, "That woman's acting skills are very good. She created the image of a gentle and generous Yamato Nadeshiko in front of the public, but who knows that she is a woman with a dissolute nature? No one has discovered this, right?"

"We are playmates"

When talking about Mori Nana, Jinpei Matsuda could not forget her shocking remarks on the bus, and asked sensitively, "What playmate?"

Yu Quanyuan remained silent and looked at the children present with some embarrassment.

Seeing that he still had something he didn't understand, Matsuda Jinpei's expression became even colder: "Just tell me."

"It's what you think," Yu Quanyuanxin exhaled deeply, like a broken jar, "We are both members of an underground club. We met in a game and later became regular playmates. It's just that not long ago, Mori Nana and I had an argument because of someone. Maybe that's why she has been pretending not to know me."

Qichuan Yuan coughed dryly: "What does this have to do with the girl you mentioned?"

"This is a bit complicated. In fact, the club provides prey every day. But they are all boys and girls with black hair and blue eyes. We don't know who she is, but one day..."

As usual, the three people who had finished everything gathered at the bar. But they all received a letter, the handwriting was handsome but very sharp, but it was not difficult to see that it was a woman's handwriting - "Your behavior has completely angered me, please stop this behavior, otherwise please bear the consequences yourself - kind-hearted people who give advice."

Mori Nana sneered and threw the letter into the trash can without caring: "What? What a middle school rhetoric."

The bartender had a complicated look on his face, but he finally advised, "Miss, I think you should follow the advice in the letter."

"What?"

"This lady is our most mysterious guest here, and she has considerable power. But she is very concerned about people with black hair and blue eyes. I think your recent behavior has attracted her attention. If you don't stop, I'm afraid you will be punished terribly."

"Tsk," Kobayakawa Eko sneered, "You're just trying to scare a kid. Do you think we'll believe it?"

Although they received the letter, they still reported here on time.

Then they received several inexplicable threatening letters. But they were always safe and gradually put the matter behind them.

"The last letter we received was before we received the invitation to the exhibition. It only had one word on it - sin."

Matsuda Jinpei frowned, "That's why you said he would die. Shouldn't we call the police if something like this happens?"

"We don't dare to call the police," Yu Quanyuanxin said with a complicated expression. If they do something like this, they will be arrested.

But it was still a little strange, Conan pondered, why were Eto Hara and Hashiki Yu so scared? Could it be that they also received a similar letter?

Sugawa Gen tapped his arm with his finger and asked, "What about Eto Hara and Hashiki Yu? Do you know them?"

Yu Quanyuan was stunned. "I don't know him. There's no way an artist like him would be hanging out with us."

Sugawa Gen: ..

But celebrities, athletes and beauty pageant champions don't sound like they can mix together.

Huihara Ai: "How much do you know about this game?"

"I'm not sure about this," Yu Quanyuanxin shook his head.

He looked confused, as if he was deep in thought. Matsuda Jinpei suddenly asked, "Then what are you doing in this room?"

"I came to look for the cards..." Yu Quanyuanxin was slow to realize what he was saying and fell silent. "I said I came to look for something I lost."

Matsuda Jinpei chuckled: "Okay, stop resisting. Just explain. It's good for both you and me if you want to get out of here quickly."

Yu Quanyuan remained silent for a long time before he slowly sighed and compromised: "Okay, this is the only way now."

"In fact, she mentioned Hecate in her previous letter to us."

"What?"

"'She said: When the night is about to pass and the dawn is about to come, Hecate will punish you on my behalf..." Yu Quanyuanxin paused, somewhat uncertain, "She will take you into heaven and into hell. When the music sounds, the messenger of the night will dance, and the light of hope will descend on the dancer's stage."

"I can't remember exactly, but it's something like this. Maybe Mori Nana thought the light of hope was the key to our escape, so she ran here when the piano sounded."

"She won't be punished, because she didn't break the rules."

Jinpei Matsuda yawned and leaned lazily on the piano. The piano keys were pressed lightly, making sporadic sounds.

Then, as if something had been triggered, the piano keys began to move spontaneously, as if some invisible person was playing, and soon the majestic music took shape and filled the entire room.

Matsuda Jinpei felt a chill on his back and subconsciously dodged, his lower body stabbed into the piano. Several things that looked like mechanical arms quickly dropped down, the pliers tightened, and the knife was picked up, being controlled to draw several strange symbols.

At the same time, there were hurried footsteps outside the door, like someone running in the corridor. Qichuan Yuan quickly opened the door, but there was no one outside.

"Tsumi Zui," Conan said solemnly, concentrating on the knife that was writing in the air, "This knife writes sin."

"There was no one outside, so Qichuan Yuan locked the door.

Matsuda Jinpei watched the mechanical arm retract into the ceiling. "It looks like it's an unknown mechanism that will be triggered whenever someone touches the piano. Maybe Mori Nana stood up in surprise because the piano suddenly played by itself. She didn't expect to be restrained by the clamps and have words carved on her face."

"The footsteps in the corridor were also recorded long ago in order to confuse us and make us think that someone had done all this."

Qichuan Yuan thought of what Yu Quanyuanxin had just said: "She takes you to heaven, and also takes you to hell."

He chuckled, "So that's how it is. This is just a trap. It gave you the key to escape from here and led you here. This is heaven. But when you came here, you entered the real hell."