"I see."

Anyway, let’s put some questions aside for now.

"Then, let me start with the simplest phenomenon."

"The simplest one means?"

"It was the phenomenon of the prisoner disappearing into the empty room at the very beginning that night."

"Huh? To me, this is completely unreasonable and strange..."

"The way of expression is very clever. Although it is a trivial technique, depending on the way of expression, it can become a wonderful phenomenon. It can be said that this is a typical case."

That night, May Yujie saw the figure of a suspected criminal at the corner of the corridor.

She chased after the man and saw a shadow entering the empty room.

When I caught up with him and entered the room, I saw that there was no one there...

On the indoor wall, there is a big X painted with pink fluorescent paint.

The room is a completely enclosed secret room with no hiding place.

"That day, we followed the access control regulations and entered our own rooms before ten o'clock in the evening. That's right. We were all in the room at least ten minutes ago."

"Um."

"That is to say, such a short period of time - about ten minutes - is enough for the prisoner. The prisoner does not need to worry about the access control. He can freely enter and leave the room when we are locked in the room."

"……yes."

"The prisoner pretended to obey the access control and entered his room. He immediately came out and then went to an empty room deep in the corridor where he made some preparations."

"Preparation?"

"Open the door ajar, and find something to jam the door. Tie a rope to the thing that is blocking the door, and put one end of the rope outside the window. These are the preparations."

"Of course, maybe the prisoner also did some tricks to create the illusion that someone had entered the room, such as putting a light and thin cloth on the thing that blocked the door."

"The thing was probably not stuck at the bottom of the door, but in the middle of the door. When the rope was pulled outside the window, the thing was pulled off. The piece of cloth turned up, and it looked like a figure might have entered the room.

.”

"What, what's going on? No one actually entered that empty room?"

"That's right, judging from the phenomenon, it's just that the thing blocking the door was removed and the door was closed, that's all. Although the matter is very simple, it gave you, Sister Yu, the illusion that someone had entered the room."

"Illusion? But there is indeed an x ​​number painted on the wall, right? If no one enters the room, then there is no way to draw the x number..."

"I can only think that the number

, this is within the plan.”

"I see..." May Yuyue couldn't help but understand, but then she immediately thought of another fact.

[Could it be that the reason why Uozumi was killed was to leave an empty room?]

"So, what about the figure we saw at the corner of the corridor? There is no doubt that it is a person, and Miss Mifune is also a witness."
Chapter completed!