After sending Tomikawa Yuki back to school, Hinata Sou went to the nearby police station. He asked for Chida Midori's address and the details of the death of Chida Midori's father. The Armed Detective Agency and the military and police cooperated closely, and most of the military and police did not have much suspicion. They just asked him to remember to make a report later.

The Chida family lived in a residential area in Yokohama. Their family was of ordinary financial condition, but they had a nice house in Yokohama. After Chida Midori's father died, no one had lived in that house.

Even the military and police were surprised that the Chida family did not have a relative who could inherit their property.

This is it.

Hinata Hajime opened the door. It was said that Chida Midori's father died at home due to a sudden heart attack. A missing person case of Chida Midori had been filed, but they couldn't find where the little girl had gone, so they had to seal off their house temporarily.

Although no one had been in for a while, the room was still clean and tidy, and there was a dry smell of dust in the air.

Hinata Hajime looked around and began to walk aimlessly in the room.

[How strange.]

Hinata frowned, [There is no room for Chida Miyo here.]

The first floor is the living room, bathroom and kitchen, the second floor is the master bedroom and study. Hinata Sou originally thought that it was Chida Midori's room, but it turned out to be a storage room filled with old furniture and books that Chida Midori didn't need for school, but there was no room for Chida Midori.

Can she still sleep on the sofa in the living room?

【Return to the living room.】

【Are you coming? 】

Hinata Sou closed his eyes, and when he opened them again, his light green eyes had turned red. Kamijou Izuru didn't say anything. He walked down step by step from the second floor. In the living room on the first floor, he looked around, and after a while he walked to the corner of the restaurant.

He applied a little force with his fingers, and with a click, something was pressed down, and soon a dark space appeared from under the floor.

【Is this a basement? 】

[Yes.] Kamizuru looked inside, but it was too dark. After thinking for a while, Kamizuru walked to the wall next to the kitchen and pressed a light switch. The basement lit up instantly, and the scene below could be seen under the dim light.

Although Kamizuru Izuru had already guessed what the scene was like below, he still went down.

It will only be over if Hinata Hajime sees it.

There were not many things in the basement, only a bed and a simple closet. Kamukura Izuru reached out and picked up the book on the bed. He saw Chida Midori's name on the damaged book.

[Is this Chida Miyo's room?] Hinata Hajime asked in surprise, [An empty basement?]

[Is Chida Miyo really the biological daughter of the Chida family? 】

[Of course.]

Kamukura Izuru put the book back on the bed and opened his simple closet. There were not only a few clothes in the closet, but also a photo carefully framed. There was a girl and a young woman in the photo. The two looked and dressed similarly. She should be Chida Midori's mother.

[If she is her biological daughter, why does Chida Miyo live in the basement? 】

【Because of this.】 Kamiya Izuru opened the photo frame. Behind the photo frame was a piece of paper. On the white paper was a person’s mental health diagnosis report.

Chida Midori's father has a mental illness. He really loves his wife and daughter, but the way he expresses his love is control. He controls his wife and daughter's lives and doesn't want them to leave his side at all. He even wants to lock his daughter in the basement and keep an eye on her.

Chida Midori's mother couldn't accept this kind of life, so she committed suicide, leaving the young Chida Midori to continue to suffer all of this.

Putting the photo frame down, Kamukura Izuru looked around expressionlessly, and when Hinata Hajime was still in shock, he spoke, "What do you think this place looks like?"

[Like what? ]

Hinata Sou looked around, and after a moment he slightly widened his eyes, […like a pitch-black warehouse.]

Students who have entered the Rat City to tell secrets once mentioned that the inside of the Rat City is like a dark warehouse. After turning on the lights, they are facing a dark hole. They can tell secrets into the hole, and there will be the sound of wind coming from the hole.

Kamijou Izuru pushed the cabinet open, and Hinata Hajime saw a dark hole behind the cabinet, but the hole was not empty. A surveillance camera was embedded inside the hole. Kamijou Izuru just noticed that there were traces of wear and tear under the floor. Sure enough, Chida Midori moved the closet here to block this thing.

A gust of wind blew over, and Kamijou Izuru looked up at the opening of the basement. Because of its location, wind was always blowing in from there.

Mouse City.

The so-called Rat City is just the evolution of a room where a girl is imprisoned.

…

The probability that Chida Midori is the desperate host is quite high. After confirming the desperate host, we must prepare to personally contact this desperate person, but there is still a problem here.

That is, they don't know where Rat City is.

Legend has it that the Mouse City is only open to those who are troubled by secrets. It is not in any one place, but it will appear anywhere, like a ghost wandering in Yokohama. It is there when you need it, and it will not appear when you don't need it.

To find Mouse City, you must find a place that matches the secret.

[A secret that I don't want others to know, but I want to vent.] Hinata Hajime murmured, [Kamiya, do you have any ideas?]

[Boring.] Kamiya Izuru said with disinterest, [Whether it's you or me, there are no secrets.]

【That’s true. 】

Hinata Hajime and Kamijou Izuru are very magical beings. They are supposed to be one person, but they have independent consciousness. Their experiences and even memories are shared. They know all of each other's thoughts and thinking patterns, without hiding anything.

They are the two people in the world who understand each other best.

Perhaps it is also called having sufficient self-awareness.

After leaving the Chida family, Hinata Hajime had no intention of changing back, and Kamijou Izuru didn't care either. It didn't matter which of them was the leader.

Of course, no one knows which will come first, the accident or Dazai Osamu, on a normal road.

Looking at Dazai Osamu who was thrown over by the military police in a wet state, Kamiya Izuru examined his clothes expressionlessly. He judged from the water plants on his body where he jumped into the river, how long he drifted, and where he was pulled out. The person in question was still complaining that his suicide plan was interrupted again.

"Dazai Osamu."

"Huh?" Dazai Osamu was stunned for a moment. He looked at Kamuzuru carefully, then stroked his chin and murmured, "Will you call my name directly in this state?"

Kamizuru moved a step to the side to prevent him from splashing the river water onto himself.

"But I remember that you were investigating the legend of the rat city in that school, right? How is it going?"

"Everything went well."

“…No more?”

"You're really boring."

Dazai Osamu couldn't help but said loudly: "This is too brief! And what's with that boring mnemonic? Speaking of which, Hinata-kun's ability is still unclear. Although I have denied it for a long time, could it be the ability to shape my personality?"

"Why did Hinata-kun create a silent personality for himself?"

Kamizuru Izuru, who was known as a taciturn person, glanced at him and said, "Do you want to discuss with me whether people who frequently attempt suicide are mentally ill? I have the talent of a psychologist."

Dazai Osamu: ...

Is the guy in front of me really Hinata Hajime?

"Okay, then what is your plan now? When I talk about the Rat City, although I know it is a desperate incident, I still think of a person called a rat." Dazai Osamu shook off the water stains on his body, "I hope that this incident will not be mixed up by that guy."

Kamukura Izuru looked at him and said, "In the early stages of development, Mouse City can only deceive high school students. Information dealers will not collect information about high school students. Once desperate incidents spread to adults, as long as there is a piece of military secrets, it will be a bloody business for intelligence dealers."

"Just because I mentioned his nickname, you knew this rat was an information dealer?" Dazai Osamu frowned.

"It's not difficult at all, but..."

Kamukura Izuru looked at Dazai Osamu and said, "How about using this secret?"

[Are you talking about Mr. Dazai's identity? ] Hinata Hajime suddenly realized.

【Of course.】

[It seems feasible.]

Dazai Osamu, who always spoke without being understood by others, looked at Kamuzuru Izuru strangely for the first time when he couldn't understand what others were saying. "What are you going to do?"

"no."

Ignoring Dazai Osamu, Kamiya went straight back to the detective agency. As expected, Dazai Osamu, who was still worried, followed him.

The detective agency had already gotten off work and it was getting dark. Kamiya Izuru walked out of the elevator and the corridor was pitch black. Kamiya Izuru did not turn on the lights. He did not even turn on the lights in the detective agency. He avoided the crowds in the dark and walked to Hinata Hajime's position. Kamiya Izuru directly turned on his computer and started typing on the document in the dark environment.

Dazai Osamu, who almost tripped over his chair, grabbed his wet sleeves and leaned over to read the words on the screen.

"I have a secret. My colleague used to be a vicious mafia member."

"I didn't expect him to disguise himself like this. He doesn't look like a Mafia member at all, but I know that Mafia members are ruthless killers. Last time, a Mafia member killed an entire family. Mr. Kunikida often told me that Mafia members are scary."

"Besides, I didn't do a good job on my mission, and he gave me a look that sent chills down my spine."

"What can I do? After learning that he was a member of the Mafia, I can no longer look him in the eye, but I dare not tell anyone."

"It's so terrible, so terrible, so terrible, let me forget all this!"

Dazai Osamu blinked his eyes. He looked at the words on the screen that could not hide his fear, and then glanced at Kamijou Izuru who was facing the computer screen expressionlessly and even disdained to look at him.

Let’s not talk about how he knew he was a member of the mafia in the past.

Is this attitude called fear?