INT. MAKOTO'S HOUSE. AFTERNOON

Aki: No, those who are at risk of death are only people who have a relationship with the killer beforehand.

Kenji: Yes, and this means that the accusation is against the employees who were in the meeting and the people who knew the victim well.

Rin: Because he can't disguise himself as the inspector.

Aki: Exactly.

INT. YOROKI'S HOUSE. NIGHT

Akane: What is the strange secret behind that man?

Sera: Mom, are you talking about the dark man?

Akane: Yes, my daughter.

Sera: The content of the message was very ambiguous. Does this mean that he was disguised as someone present?

Akane: Sure.

Daiki: Except for one person.

Sera: Who is he?

Akane: Inspector.

Sera: But why?

Daiki: Because if he disguises himself, he will be found out.

Sera: But he revealed his trick in the end?

Kasaki Hira (on TV): We just received a piece of paper with the Dark Man's signature on it. Is it a threat to kill another person? Let's open it.

Suddenly the inspector enters and takes the paper from the announcer.

Inspector Asahi (on TV): We ask all employees here, if they receive any paper with his signature on it, to inform them before opening it.

INT. BEIKA POLICE'S OFFICE. NIGHT

The police office receives a call from a civilian about a message from the killer.

Takagi: Aya, we have to go to a house on 4th Street in Haido.

Aya: Takagi, what is your reaction to this criminal?

Takagi: He's a bastard criminal who should rot in prison.

INT. FURUYA'S HOUSE. NIGHT

Aya: Well, what happened?

Furuya Ken: We were watching a movie when the door knocked. My wife went to open it, but she only saw this paper. I did not open it when I saw the Dark Man’s signature.

Takagi: Do you have children?

Furuya Ken: Yes, but I told her to enter the room with them so that they would not be afraid.

Aya: Oh, so they are under 18 years old.

Furuya Ken: Yes. I have two children, the first is 8 years old and the second is 6 years old.

Takagi: Do you have enemies?

Aya: What do you do?

Furuya Ken: I am an employee of a company.

Takagi: Continue?

Kenji: At Yamada Sanitary Ware Company.

Aya: What??

Takagi: Hey, who are you?

Kenji: Makoto Kenji a private detective.

Aya: Is what he said true?

Furuya Ken: Yes, I am an employee in that company, and I was invited to the meeting, but I did not go.

Kenji: No, you went.

Aya: Are you lying, sir?

Kenji: Neither.

Takagi: The one who left is the one who sent the letter.

Aya: The killer...

INT. BEIKA POLICE'S OFFICE. NIGHT

Inspector Asahi: What did you find?

Aya: Oh, it was one of the.

Kenji: How did you know, Inspector?

Inspector Asahi: Oh, the policeman told me.

Takagi: Oh, well, we found this letter. Take it, open it.

Inspector Asahi: So who are you?

Aya: Oh, it's Makoto Kenji, a private detective.

Inspector Asahi: Did the cat eat your tongue?

Kenji: I am Makoto Kenji, the man who will catch the serial killer, the Dark Man.

Inspector Asahi: Very good. I'm going to the bathroom.

Kenji: Bye.

The inspector goes to the bathroom.

Aya: Okay, let's continue our talk.

Kenji: Shh.

Takagi: What happened??

Kenji: He's not the inspector.

Aya: What???

Kenji: The officer did not mention to us that the inspector had come or asked anyone about you.

Takagi: What?? Yes.

Aya: We have to catch him.

They rush to the bathroom, but they do not see anyone except a letter with the dark man's signature written on it.