As of today, the half of the Nightmare that belonged to Gray Plains has come to an end - if the promises from Belmode are ever to be believed.

But the nightmare about the organization continues.

"I'm not the one who offered to make a detective of you," Belmode said as they parted. "I'm just being commissioned."

"Who?" Qian Yu asked.

"I can not kill you, but I can't betray my colleagues either." Belmode shrugged. "So I can't tell you who it is."

……

July 5th, the second and final day of final exams, half an hour before exams. The detective group gathered around a table and looked at the large plastic box on a classmate's desk.

"You just said that this beetle with its wings attached to it was like this when you found it?" Chiba looked at the box containing the beetle brought by her classmate and raised her eyebrows.

"yes," the classmate said, knocking on the plastic shell of the box. "Look, do you have two stickers on the wings on the back of the beetle?"

"Huh?" Qian Yu looked at the back of the beetle, and sure enough, he saw two pieces of "V" shaped tape attached to the back of the beetle in the box - to be precise, it was not ordinary tape, but the tape attached to the bento in the fast food restaurant, and the word "Open" was printed on it.

"Because my parents weren't home for the past two days, I brought it here." The classmate looked at Qianyu and said. "Because I'm clumsy, I don't dare tear the tape for it - can any of you help me?"

Qian Yu glanced at Gray Yuan Ai, and just happened to meet Gray Yuan Ai's gaze. After a few seconds, Gray Yuan sighed. "I'll do it......"

With that, Gray Hara took it out of the pencil case...... A compass!

“！！！” Qian Yu was stunned. "Hey, what are you going to do?"

"That's why you're coming." Gray Yuan looked at him angrily.

"......" Qian Yu sighed, and then took the compass. You're a real threat......"

That's the idea this girl plays, right? She knew she couldn't use a compass to peel off the tape without hurting the Beetle, and she knew she couldn't, so she threatened herself with that......

With the help of the auxiliary unit, the sharp compass acts like a deft tweezer to remove the stickers that cling to the wings of the beetle.

"I'll take the sticker home," Chiba returned to the backpack with the compass attached to it, and put the sticker into a sealed bag taken out of the backpack. "Let's see if we can find any clues."

The organization seems to have obtained a large amount of fingerprint data through unknown channels, so last weekend, Chiba cracked the authentication mechanism of the organization's fingerprint database through the temporary head of the computer department of the Champs-Elysées rebellion (the one who was threatened by Hoshino Kaede in the countdown part of the kingdom), and obtained a login account that did not require information authentication. Now he plans to use this fingerprint as a raw material to try out the database.

At this moment, the bell rings, symbolizing the imminent start of the last exam.

…………

After school, Tachibana House.

"Will it work?" Gray Yuan looked at Qian Yu and asked.

"I'm not sure," Chiba shrugged as she held an aerial drone. "But it should be possible, right? At least I can't find a flaw in theory. ”

After saying that, Qian Yu took a deep breath and ————

"Buzz!" Without warning, the four propellers of the drone in Qianyu's hand rotated at the same time, and then drove the entire drone to rise slowly.

"Oh!" Gian took a few steps back and raised an eyebrow. "Did it really work?"

"That's good," Gray Yuan nodded as he looked at the drone flying into the sky. "It really worked."

Just now, Chiba copied the signal pattern of the remote control of the newly ordered drone with an auxiliary unit, and then tried to reproduce it with an auxiliary unit - it was this signal that drove the drone into the air.

"But in the future, we will have to modify the signal receiving system and adjust the signal frequency of this," Qian Yu said as he raised the drone in place a few times. "If the original frequency of this product model is maintained, it is likely to conflict with other drones of the same frequency, in which case it will be controlled to someone else's drone nearby, or let someone else abduct the drone."

Since the beginning of the previous use of auxiliary units to interfere with communication systems, Ji'an has been trying to develop the potential of auxiliary units in electronic warfare - his previous attempts to camouflage base stations and fake signals have proven the unrivaled overwhelming power of auxiliary units in communications, and this simulated control of aerial drones is his attempt to use electronic warfare capabilities in real combat.

Then, it's time to test other variables......

Two of the drone's four propellers suddenly began to slow down and began to rotate in the opposite direction, driving the entire drone to flip in this direction.

The model aircraft drone ordered by Qianyu is not a conventional model - if the conventional model is tilted at such a large angle, it is basically possible to fall directly upside down at any time - but a customized version with a specially improved power system, which not only enhances the power, but also the propeller can achieve the same output in the case of reverse rotation, which makes this model aircraft drone can make very complex technical actions.

At this time, the horizontal plane of the drone is completely perpendicular to the bottom surface, and it dives to the ground in a barrel rolling posture action. But at a certain moment, the two propellers of the drone began to rotate in opposite directions, so that the barrel rolling of the drone turned into a return to the normal action of readjusting the drone to a horizontal attitude, and the drone, which originally seemed to be planted on the ground, had been stable in the air after a short buffer.

"How much did you spend on this drone?" Gray Plains asked. "Doesn't it look like a bargain in terms of performance?"

"After bringing three sets of refurbished parts, it costs 450,000 yuan, considering this performance, the price is okay." Chiba let the drone land in her hands again, and then turned off the camera on it. "Let's go back, I'll import the drone's data into the computer and look at the specific performance indicators."

Although the manufacturer has given some performance indicators after improving the power, Qianyu needs to record the video of the camera hanging on the drone to determine some relevant parameters that the manufacturer did not mention, but are important for air mobility.

Connecting the camera to the computer, Chiba and Ash Hara sat side by side in the computer chair, looking at the computer while playing the video and analyzing the parameters.

Suddenly, Qian Yu froze for a moment, then rewinded the video backwards for about five seconds, and then stopped the video on a clip.

"What's wrong?" Gray Plains looked at Qian Yu with some strange eyes.

"This ......" Chiba's face was full of confusion, and the mouse pointed to a tree at the edge of the frame.

“！！！” After Gray Yuan Wai saw it clearly, his face was already a look of horror. "Tachibana!"

"I'm ......" Qian Yu whispered to soothe Gray Plains, but there was also horror in his eyes.

On the tree on the screen, a crow is holding a finger with a ring in its mouth.