Studying biochemistry in anime is definitely a mistake

"It's okay. I'm not going to die anyway."

Nagai Kei's words had just fallen.

Sato's voice sounded from the other side of the room:

"Brother Nagai, can you hear me? Feeling that you won't die makes it easy for you to make rash decisions. When I say I'm going to kill you, I'm not just talking about it. Demi-humans can die! When a demi-human's body is resurrected, if a part is too far away, it will grow a new one. But what if that part is the head?

I will chop off your head in a moment, and then hold your head and stand a little further away from your body, so that you can see with your own eyes how your body regenerates a new head to replace yours before you die!

Do you think that the person who resurrected you is still yourself? You are wrong! I cut off your head! Your life will end here! I will make you regret it! Regret that you shot me! "

After hearing Sato's words, Kei Nagai couldn't help but tremble in fear just by imagining the scene of watching his own body regenerate his own head.

"Little brother Nagai Kei, you still have the choice to give up."

The researcher wearing a mask patted Kei Nagai's shoulder and comforted him.

"I will not give up!"

Nagai Kei gritted his teeth and said:

"Since I said I would help you escape, I will do it no matter what!"

However, at this moment, Sato, who was standing on the other side of the room, finally noticed that Kei Nagai was faintly showing three fingers on the file rack.

——So you were hiding here!

Sato stepped forward quickly and immediately pointed his gun at Kei Nagai who was behind the file rack. Then he saw those three fingers - only those three fingers!

These were three fingers that Kei Nagai had cut off from his own body and placed next to the filing rack as bait.

——Oh no! I’ve fallen into a trap!

Just as Sato was about to turn around and look behind him, Kei Nagai raised his scalpel and jumped down from the file rack.

——The target is the spine at the back of the neck. As long as we can destroy that place, he will lose the ability to move, but he will not be killed!

But will things really develop so smoothly?

Sato took a step forward and leaned forward, allowing the attack that was supposed to hit the back of his neck to fall on his back. Then he took the opportunity to pull out the machete with his right hand, passed it through the armpit of his left arm, and stabbed Nagai Kei in the abdomen. Finally, he straightened his body and pushed backwards, knocking Nagai Kei to the ground.

The other two researchers seized the opportunity and immediately stood up from the other side of the file shelf and ran out the door.

Just as Sato was about to draw his pistol and shoot the two fleeing people, Nagai Kei immediately pulled out the machete that was stuck in his abdomen and slashed at Sato's ankle.

Sato was injured and felt pain, his body trembled, and the bullet he fired finally just passed by the two researchers.

Outside the door, the masked researcher took out a marker and left marks on the wall along the direction of his escape, just as he had promised Kei Nagai.

"Damn it! If only I hadn't done this, why am I so unlucky!"

Kei Nagai got up from the ground, covering the wound on his abdomen, and leaned against the wall, complaining continuously.

Sato picked up the machete on the ground and slashed at Kei Nagai's neck.

——Use your hands to block it! There are two bones in your arms, the radius and the ulna. Even if you can't completely block it, you should be able to deflect the attack! Maybe you can avoid being beheaded!

Thinking this, Kei Nagai raised his arms to protect his head.

But the next second, the attack that Kei Nagai expected did not come - Sato stopped attacking and suddenly retreated as if facing a powerful enemy.

A large number of black particles began to emerge from Kei Nagai's body.

“How can there be such a large amount?”

Sato suddenly felt something was wrong and continued to retreat.

A huge number of dense black particles gradually gathered into a human shape - it was a black ghost!

"Is this Nagai-kun's black ghost? The shape of the head is round..."

Looking at the black ghost released by Kei Nagai, Sato did not dare to act rashly for a moment.

Although Kei Nagai didn't know what the black ghost was, when he saw Sato stop attacking, he immediately ran out the door.

"Hmph! Want to escape?"

Seeing this, Sato quickly raised his pistol and aimed at the fleeing Kei Nagai, but before he could pull the trigger, the black ghost released by Kei Nagai stretched out its claws and cut Sato in half.

——Under normal circumstances, the black ghost should follow the orders of its master, but what's wrong with this guy? Isn't he a little too arbitrary? However, maybe Nagai Kei is really interesting...

Before he died, Sato looked at the black ghost released by Kei Nagai for the last time and analyzed it in his mind.

"I'm saved... I have to thank that thing..."

Kei Nagai covered his abdominal wound and ran along the mark left by the researcher in the corridor, muttering to himself:

"Black Phantom, although demihumans can release that thing...but does it have anything to do with immortality?"

……

"Dr. Ogura Ikuya, you said that the black ghost is a transparent person made of unknown substances, but what does this have to do with the immortality of the demi-humans?"

The ordinary researcher in the monitoring room continued to ask Ogura Ikuya.

"Hmm~ Tell me, why do humans eat oranges?"

Ogura Ikuya suddenly asked back to the other party.

"what?"

The researcher looked puzzled, obviously not understanding what Ogura Ikuya wanted to ask.

"It's because humans cannot synthesize vitamin C, so they can only get it by eating fruits."

Ogura Ikuya slowly opened his mouth to explain:

"When a malnourished demihuman is resurrected, he can even generate the nutrients his body needs out of thin air. When a demihuman is injected with anesthetics, his body will automatically eliminate these unhealthy factors when he is resurrected. Therefore, the immortality of the demihuman cannot be unrelated to the unknown substances created out of thin air!"

……

On the road leading out of the building, the researcher who took off his mask suddenly stopped.

"what happened to you?"

The researcher, who was still wearing a mask and leaving marks on the wall with a marker, also stopped and turned to ask the other party.

"I'm going to hide in this room."

The researcher took off his mask and pointed to the door next to him and said:

"That man in the hat could catch up with us at any time by following the marks he left behind. It might be safer to hide in the room."

After saying this, the researcher took off his mask and pushed open the door and hid inside.

Seeing this, another researcher who was still wearing a mask did not say much. He continued to hold the marker, leaving marks along the way while running out of the building.

Not long after, the resurrected Sato followed Kei Nagai to the door of the room, although he keenly noticed that something was wrong on the wall - the mark drawn with the marker paused here obviously!

However, in order to catch up with Kei Nagai as soon as possible, Sato chose to continue running forward.

Listening to Sato's footsteps gradually fading away, the researcher who took off his mask finally breathed a sigh of relief.

However, in the next second, the door of the room was suddenly opened, and a black ghost with a lizard-like head pushed the door open with a pistol in hand.

"Can you see it?"

The black ghost looked at the shivering researcher and greeted him.

"You...you...what are you?"

The researcher was so frightened that he sat down on the ground and crawled backwards using his hands.

"Humans do sometimes see me when they are shown strong emotions, such as murderous intent."

The black ghost released by Sato continued to explain to the other party.

"No...no...don't kill me..."

"Sorry, I can't do that, because I really like killing people."

The black ghost waved his hand, walked forward, picked up the researcher's body, opened his bloody mouth, and bit off the other's head in one bite.

On the other side, Kei Nagai finally followed the marks left by another researcher and finally reached the rooftop of the building.

"Brother Nagai! This way!"

Seeing this, the researcher quickly waved to Kei Nagai.

"Why are you still here?"

Kei Nagai covered the wound on his abdomen, ran up to the other party in the drizzle, and asked.

"I'm going to teach you how to use this, the fire escape ladder. We'll use this to get down."

The researcher patted the emergency ladder beside him and replied.

"No need. If I jump directly from this height, I will probably fall to my death."

Kei Nagai waved his hands and wanted to jump directly from the roof.

"Don't worry, I have another question for you. After you escape, how do you plan to get rid of that hat man?"

The researcher quickly grabbed Kei Nagai who was about to jump off the building.

"Ah... this... I haven't thought about it yet..."

"I can drive you anywhere you want to go."

"Eh?"

"Little brother Nagai Kei, although what I did before was all due to work, I did some very cruel things to you after all. I know that you must have encountered many tragic things after becoming a demi-human, so I feel bad..."

"You must have misunderstood something. I'm just a scumbag who only cares about others on the surface."

As soon as Kei Nagai finished speaking, Sato followed the mark all the way to the rooftop, raised his hand and fired a shot, directly shooting through the researcher's chest.

After hearing the gunshots, Kei Nagai immediately hid behind the cover.

——The researcher was shot in the chest and should be dead.

Kei Nagai glanced at the researcher's body and planned to jump directly from the roof.

But just as his hand placed on the rooftop fence, the researcher who was shot in the chest suddenly cried out in pain.

——Is he still alive?! Didn't the bullet hit his vitals?! But I can't save him in this situation. Even if he didn't die on the spot, he would be seriously injured and will die from excessive blood loss soon. I have to escape immediately!

Kei Nagai shook his head, trying to get rid of the unnecessary thoughts from his mind and jump off the building right now.