Men Nan didn't dare to fall asleep, and stood stubbornly in the middle of the room. He still maintained a strange posture, as if his head was about to be pressed down from his shoulders.

"I always feel like there's something pressing on his head." Chen Ge was afraid of upsetting Men Nan, so he spoke in a low voice, "It's not a psychological fantasy, but something that really exists."

Dr. Gao waved his hand gently and stayed beside Men Nan. He took out his mobile phone and seemed to be texting someone.

Seeing that Dr. Gao did not respond, Chen Ge began to search other rooms in the rental house.

The house is only about 30 square meters, but it has everything you need, including a bedroom, a living room and a separate bathroom.

"It looks like an ordinary rental house." Chen Ge looked around but didn't find any blind spots. There was no possibility of a body being hidden.

He came out of the living room and pushed open the wooden door of the bathroom. To his surprise, there was a half-length mirror hanging on the wall opposite the door.

"Mirror opposite the door?" Because of the first nightmare mission, Chen Ge was very sensitive to mirrors.

He walked silently to the mirror and looked at himself in the mirror: "It's a rare layout. It must feel a bit strange to see myself in the mirror as soon as I open the door."

The mirror surface is very clean, as if it has been wiped frequently, and there is no stain at all.

Looking away, there is a washbasin under the mirror. In Men Nan’s nightmare, he was standing here washing his hair.

Chen Ge imitated Men Nan's posture, lying in front of the sink, bending his body forward ninety-five degrees, with his head just enough to fit under the faucet.

"From this angle, we can see the scene outside the house. The scene he dreamed of is entirely possible." If Chen Ge was lying under the faucet and could not see the scene in the living room, or his vision was blocked by other things, he would not feel scared, which means it was just a dream.

But after he tried it himself, he found that all this was completely possible even in reality.

I stuck my head into the sink and the world appeared upside down in my eyes.

"Men Nan said that every time he had a dream, the man would get closer to him. This place is also very suspicious. Why didn't the man just come over and kill him? Why did he have to torture him bit by bit? Is there some deep hatred between the two?" Chen Ge was thinking when he suddenly felt a chill on the back of his neck. He immediately straightened up and touched his neck.

"A drop of water? Where did it drop from?" Chen Ge looked up at the roof. There was no sign of water seepage on the ceiling. The drop of water appeared inexplicably.

"Could it be a mirror?" A picture emerged in his mind: he was washing his hair in front of the sink, and the person in the mirror leaned out half of his body and grabbed his neck.

"The black phone shows that the name of this trial mission is a room with three people. The name of the mission itself is a hidden hint." Chen Ge looked at himself in the mirror and felt as if he had guessed something: "There are three 'people' in the room. Men Nan is one, and the man who kept approaching in the dream is another. At this time, there is a third 'person' in the room. Could this third person be hiding in the mirror?"

Chen Ge supported himself on the sink with both hands and glanced to both sides. He found two empty shampoo bottles in the toilet trash can.

"How long has Men Nan moved into this apartment building? He has already used up two bottles of shampoo? If he only washes his hair in his dreams, how can there be less shampoo in reality? Does this child have the habit of sleepwalking? Would he go to wash his hair alone in the middle of the night?" Chen Ge thought about it for a while and felt that it was unlikely. When he talked to Dr. Gao before, the other party said that. In order to rule out the apartment itself as the cause, Dr. Gao took Men Nan back to his home, but Men Nan's nightmare did not stop.

"We can rule out the possibility of sleepwalking for now, but if Men Nan used up two bottles of shampoo in a short period of time while awake, that would be even more strange. Why would he wash his hair so frantically?"

Even the most clean-loving person would only wash once a day, but Men Nan used up two bottles of shampoo in a very short time, and only half of the third bottle of shampoo was left on the sink.

"Under what circumstances would a person keep washing his hair? Is it itchy? Is it dirty? Or does he feel like there's something in his hair?" Chen Ge leaned against the wall and thought, "Men Nan had two fights at school. The first was because he found the animal pattern on the curtains asymmetrical, and the second was because he couldn't count the sesame seeds on the pie. This person must be suffering from severe obsessive-compulsive disorder."

For a person with obsessive compulsive disorder, if there is something slightly wrong, they will try their best to correct it. If they cannot correct it, they will feel uncomfortable all over. Chen Ge thinks that Men Nan washes his hair crazily for this reason.

"Only Men Nan knows the answer to the question. He must have concealed something very important from Dr. Gao." Chen Ge was speculating when his cell phone suddenly vibrated. He took it out and saw that it was a text message from Dr. Gao.

"Men Nan's family background is a bit complicated, and it's not quite the same as the results of my previous investigation. After I told his family about his condition, his family reacted very coldly. They just said they would put enough money into Men Nan's bank card for treatment, and they had no intention of coming to Jiujiang to visit him. It's not convenient for me to let Men Nan know about this, so I can only send you a text message to tell you."

"Your own son is sick? As a parent, you are unwilling to come and accompany him?"

"I didn't expect that when I asked Men Nan and his classmates, everyone thought that Men Nan was born in a very harmonious family. I even checked his social media platform and found many articles expressing gratitude to his family."

Men Nan presents himself to outsiders as a good student who lives in a warm family, has received a good education, has a cheerful personality, and has solid professional skills. But in fact, all this may just be his disguise.

After reading the text message, Chen Ge told Dr. Gao about his discovery.

Not long after, Dr. Gao replied to his several text messages.

"OCD can be roughly divided into four categories: worry, ritual, cleanliness, and perfectionism. From my observation, Mennan's condition does not belong to any of these four categories. He seems to wash his hair simply because he has this need."

"In my opinion, Men Nan's behavior is more like another psychological illness - post-traumatic stress disorder. For example, after an earthquake, some survivors will be in a state of high alert for a long time. It is difficult for them to get rid of the shadow of the earthquake. The brain will give them feedback of a wrong message, as if the earthquake will happen again at any time."

"Men Nan's symptoms are very similar to those of post-traumatic stress disorder. He is nervous and his eyes are darting around, which means he feels very insecure, as if something could hurt him at any time. In this case, washing his hair may be an act of self-protection."

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