Usually, crimes are secret, and even if a serial criminal leaves evidence that he himself is a criminal.

INT. MAKOTO'S HOUSE. NIGHT

Everything was normal even after we went to sleep, but that changed at about 4:30 in the morning. We heard screaming, as if someone had seen a ghost.

Aki: What's going on outside?

Then we heard police sirens, and there was a murder in the same building where I live.

INT. BEIKA POLICE'S OFFICE. MORNING

The message opened.

Chiba: What do you think of the game of cat and mouse? You are the cat and I am the mouse. Goodbye, I will see you with my next crime, Kazuma Mirashiki.

INT. MAKOTO'S HOUSE. MORNING

Meiji: That's weird.

Kenji: What?

Meiji: I mean the serial killer, why did he kill someone as a TV presenter?

Kenji: I'm sure that the solution to this crime lies in the secrets of the victim, Mizunashi Ryo, because today's episode that was supposed to air was about crime.

Meiji: You mean that the victim knows who the killer is?

Kenji: Yes, and he knows that he will die and the episode will not be broadcast. What?

Meiji: Then he will record the episode.

Kenji: Right.

Meiji: So the episode was recorded in the studio..

INT. BEIKA NEWS BUILDING. MORNING

We went to the TV station and asked.

Meiji: Where is the reality and fantasy show broadcast?

Kuro Daniel: Oh, sorry, I'm new here.

Kenji: Come on, let's ask that.

Meiji: Okay, come on.

Kenji: Hello, do you know where the reality and fantasy show is broadcast?

Kishuro Itsu: Oh, you mean the studio, it's there.

We went in there and found the computer.

Meiji: How many episodes is the program?

Kenji: It's twenty and with this episode it's twenty-one.

Meiji: But what appears here is that the criminal preceded us and erased the episode.

INT. MAKOTO'S HOUSE. NIGHT

Weeks have passed since the first crime occurred, and the police are still asking questions about the cause of the crime. Then the fourth crime occurred and the criminal left a message behind him like the following crimes, telling him: This is the beginning. Just wait for Kimichi Kubo’s death.