At noon, the teaching building of Didan Primary School.

"Okay, then I'll quit first." Qian Yu bowed slightly at Kobayashi Sumiko, and then exited the teacher's office upside down.

When he walked out, his face was full of gloom.

Ms. Sumiko Kobayashi had just told him that they had indeed addressed Tachibana and sent a letter explaining the Games - but again, Chiba hadn't received it.

What really made him feel bad was actually a question that suddenly came to Qianyu's mind.

Someone can't have touched their mailbox, right?

Wait a minute, I shouldn't have a game in the afternoon, maybe I can ......

………… Fifteen minutes later, Qian Yu appeared at his doorstep.

If you want to steal a letter from it, you can't start with the structure of the mailbox, so you can only open the mailbox by picking the lock, so you can take out the letter.

Qianyu hadn't thought about this aspect at all before, so he hadn't checked the keyhole for signs of violent destruction. Chiba walked over to his mailbox and carefully examined all traces of the lock.

Old scratch ...... Basically, they are all old scratches, and there are almost no newer scratches - the number of scratches is not at the same level as the number of scratches that would result from a normal violent lockpick. In other words, the possibility of violent unlocking can be basically ruled out.

It can't be a technical unlock, right? If it is directly opened by pushing the lock post like Qianyu did in the material room of Emperor Dan High School before, then it is almost impossible to see the traces - technical unlocking is essentially similar to unlocking with a key, and it is almost impossible to check out.

At this moment, Qian Yu saw a middle-aged man walking towards him with a pile of things - this person is the male owner of a family who lives in the mansion opposite the orange house, judging from the door number, it should be called Gaoyuanji, right? Just now, this person seems to have been checking the contents of the mailbox.

"Little friend," Gao Yuanji said as he walked over. "Do you see these are your things?"

"Huh?" Qian Yu was stunned, and hurriedly took the things in his hand from Gao Yuanji's hand, only to find that these were a stack of newspapers, and there were two letters in them. "No wonder I feel wrong...... I didn't get the newspaper I subscribed to in the past two days...... But sir, why are you there? ”

"I just came out to pick up the afternoon newspaper," Gao Yuanji explained. "I found that the postman, who usually only stuffed half of the afternoon newspaper into the mailbox, actually stuffed the afternoon newspaper in its entirety today, so I opened the mailbox, and then I found that these newspapers I had not subscribed to at all. I glanced at the address of the wooden-colored letter above and saw that it was your letter, so I sent it to you. ”

"Letters?" Qian Yu raised his eyebrows, and quickly looked at the letter at the top of the two stacked letters, and found that he had indeed signed his address and name. The name of the sender is Sumiko Kobayashi - it seems that this is the letter of explanation for the sports meeting sent to him by the school.

"Since it's your letter, that's fine." Mr. Koenji nodded. "Then I'll go back first."

"Okay." Qian Yu also nodded. "Thank you."

With that, Qian Yu began to read the contents of the next letter - this letter was facing up on the back, so Qian Yu needed to turn it over to see the contents.

Just when Qian Yu pinched the edge of the letter and was about to turn it over, he found that he was pinching something strange.

It was indeed not uncommon for something to be contained in the letter, but Qian Yu couldn't react to what the thing he was pinching was at the first time.

Then, Chiba's expression became very strange - because the data table created by the tactile feedback from the auxiliary unit was very subtle.

With a volume of about 0.4 cubic centimeters, most of the tactile sensations are soft objects, and considering that the inability to press the tactile sensation cannot match the tactile sensation of the gas filler, it is obvious that there is a large amount of rigid liquid objects filling inside. But...... There is a small percentage of the tactile surface that is hard to the touch and cannot be pressed.

What is this?

Flipping through the envelope, Chiba found something more subtle - the sender was not marked on the envelope, and there was no postage stamp, and the recipient column was not marked with Chiba, but the Koenji family! What's even more strange is that the words of Gaoenji were actually pasted on the envelope with words cut out of the newspaper!

"This ......" Qianyu's brow locked—this wasn't a very common situation, and something wasn't quite right no matter how you looked at it.

Originally, he wanted to call Gao Yuanji and give him the envelope that obviously belonged to him, but Chiba chose to open the envelope by mistake—the person who would write like this was probably not a good guest.

Chiba turned the envelope back on, and then tore the envelope open - even if it was time to explain why Chiba had opened a letter that didn't belong to him: Chiba could have said that he thought it was his letter, so he opened it directly, only to realize that it wasn't his letter.

After opening the envelope, Qian Yu looked directly inside, and the contents of it also caused Qian Yu to feel conflicted in his heart - satisfying his curiosity, but at the same time making his scalp a little numb.

The envelope contained a small toe that clearly belonged to a human.

“！！！” Qian Yu looked at these in surprise before reacting to what was happening. "Mr. Koenji! Come here! ”

……

Chiba and Mr. Koenji sat in the living room of the Koenji family's mansion, looking at a piece of stationery taken out of an envelope, which was also pasted with movable type like an envelope.

"If you dare to call the police, your daughter Keiko will be dead, and you must act according to the instructions I give."

"Forehead......" The corners of Qianyu's mouth twitched. This ......"

"......" At the same time, Mr. Koenji and Mrs. Koenji beside him also looked at Chiba.

"What are you going to do?" Qian Yu suddenly felt that something was wrong. "You're not going to kill it, are you?"

Chiba's traceless umbrella was placed in the school bag, and the school bag was left at the door, and now if Mr. Koenji wanted to make a rough move, there was no chance that Qian Yu would leave here alive.

At this moment, the doorbell of the Koenji house rang.

“？” Mr. Koenji, apparently surprised, walked briskly to the floor-to-ceiling glass window of the living room and looked at the scene at the iron gate—a group of men in police uniforms, led by two people, standing together in front of them.

At the same time, Chiba stretched out his head and saw the scene in front of the door—and he knew the two men who led the police.

It was Officer Twilight and Gregory.

……

With a reluctant smile, Mr. Koenji invited Officer Twilight and Grigory to the living room, while Chiba had already been taken to another room by several of the valets.

"Excuse me," Mr. Koenji said nervously. "Do you have anything to do?"

"We found a body on the bank of the river in Rice Flower Park this morning," Officer Twilight solemnly pulled out a photo. "After Mr. Gregory's medical examination, we believe that this body probably belongs to your daughter, Miss Keiko Koenji."