The love of functions and derivatives

Chance saw that the function was about to leave, so he hurried forward to offer courtesy: "Your injury should be healed, or I'll take you home."

function rejected.

After returning home, everything in the house has been cleaned up.The messy bloodstains on the ground were gone, and the chairs and stools that were lying on the ground were neatly placed under the table.

It should be Derivative who cleaned it up for him, because the house key function only gave Derivative one person.

But the function felt a little uncomfortable today, he didn't blame the derivative for not picking him up tonight.It's because the derivative lied to him.They are all adults, and sometimes they have to tell a lie to protect their privacy, but Function feels that after this incident, shouldn't the derivative be closer to him?

Why does it seem to be deliberately alienating?

Wait, why am I thinking that? !

Although Derivative would visit him in the hospital every night, Function had the above absurd idea.

In fact, everything seems to be traceable—for example, the night when I joked about "promise with my body", it was actually a bit of sincerity, but the other party didn't respond at all. In order to avoid embarrassment, Function immediately pretended to be asleep up.

When did it start?

Function carefully recalled the abnormal situation of Derivative from the time he woke up to getting along with Derivative, and then he suddenly realized that the fifth sentence that Derivative said to himself after waking up was not right.

——"No. When I went, he had already fled. I immediately called 120 and called the police."

Derivative If you really didn't see the delivery boy at that time, the usual reaction should be to ask, who is the delivery boy?Is it the one who killed you?

Not that he ran away.

correct!

Function remembered that the first time he felt someone was following him was when he installed a pinhole camera at home.The function turns on the computer, and the mouse clicks on the file recorded by the camera.

In the picture, he was lying on the ground, Derivative pushed the door in, first made a phone call, and then Derivative walked a few steps in the direction of the delivery boy.The delivery boy might have said something to the derivative, but the derivative stopped in place, and then the delivery boy took out another knife.

The next moment, Function frowned in disbelief, unable to believe his eyes——

Because in the picture, the takeaway brother stabbed himself in the chest with a knife.

Then, the screen suddenly went black.

what's the situation?

The function tossed for a long time and failed to solve the black screen problem, so I had to go to a certain treasure to contact customer service.

Some treasure customer service: Dear! The pinhole camera with 9 yuan and 9 free shipping must be out of battery~

Some treasure customer service: Dear, come and see the new products in the store [link], buy now and enjoy a discount of 0.00000001 yuan~/rose

Function: ...Damn, the chain is lost at a critical moment!

But he wasn't all in vain—

The derivative lied to him again.

The derivative said that the police station has not caught the person who assassinated him. If what the derivative said is true, according to the pictures in the surveillance, the takeaway brother was obviously planning to commit suicide, so he should have died at the scene of the crime. Why didn't the police catch him?If the delivery guy didn't succeed in committing suicide, what would be the reason?Other than me who was in a coma, the people present only had the derivative. What did the derivative do to make the delivery boy give up his suicidal thoughts?

What exactly is the derivative lying to hide?