After reading the information in front of her fifth time, Yuriko decided to evolve into White Death. Sewer Horror seemed like a good option, but it the fastest option if she wanted to die due to a large body and smell that clearly telling everyone to kill me before its too late.

As for Pack Leader, it was a more personal thing. Yuriko knows herself more than anyone she knew herself had no talent for command, leaving White Death as her choice.

'I chose White Death.'

Received host's choice, warning this is last host's last chance to redo the choice.

'Yes, I am sure about my choice.'

Beginning evolve Test rat to White Death.

At the same time hearing the system's voice, Yuriko felt her consciousness slowly fading away, until her vision turns black.

She doesn't know how much time is past, Yuriko has woken up the system's sound.

Evolution complete. Host successfully evolved into White Death. Base status is increased. Host's age limit increased to 30 years.

Acquired Trait Symbiosis, Night Vision, High Toxin Resistance, Enhanced Metabolism, Enhanced digestive system, Strengthened Stomach Acid, Mutated Tomer.

Ribbing her eyes from tiredness, Yuriko checked her body for any external change. After inspection later, she understood, she looks like a little bigger version of a lab rat with somewhat sharp-looking claws.

Then Yuriko read a description of her new traits. Almost all of them were self-explanatory except for symbiosis, as she knew rats don't have any relationship with anything.

Symbiosis White Death is a species that has a deep relationship with the Terrus parasite. Terrus is a unique type of parasite, exists inside the White Death's body feeding off a unique substance produced by Tomer, pituitary gland, Stomach. In exchange for that Terrus parasite will provide two benefits to the host. First It will protect the host's body from any harmful element and parasites. Second It will try to make the host alive possible in every way as it can't survive by itself this is a reason behind rumors about the immortality of White Death.

After finished reading information, Yuriko felt shiver ran through her entire body. It was the right reaction from anyone if they know another living thing living inside its body.

'So right now, this thing living inside me ?'

Affirmative, Terrus went extinct alongside the White Death, but thanks to a system, it able to create last of its kind and plant inside the host's body. Also, don't worry host, Terrus continue to live until it ran out of food, which is impossible unless the host is dead.

At this point, Yuriko felt afraid to ask the reason behind White Death's name, but in the end, her curiosity bested her, so she asked. But she received an unexpectedly simple answer from the system.

The tale has been stolen; if detected on Amazon, report the violation.

Just one idiot emperor thought he can become immortal if he is able to get the Terrus parasite, but due it is not meant to be in the human body in the first place. So it infected the emperor's brain turning him into something similar to a living zombie that hunt and infect people to search for the correct host.

In the end, empire destroyed and half-assed information found from document people hunted species to extinction thinking some sorts of cursed monster that carries deadly disease.

After hearing the story, Yuriko had nothing to say because she couldn't deny sometime how people do crazy things for even stupid reasons.

Feeling a bit hungry, Yuriko has begun to eat her meal from the feeder. She felt a little bit weird as today the doctor didn't do one of his experiments on her. At night she hears the loud sound of a door slamming shut. Looking in the direction of the door she saw, Doctor White walking towards her.

*Hic!*

Under dim light passing thought window, thanks to her night vision Yuriko understood the doctor is clearly drunk. Holding a glass of booze in his hand, Doctor White looked around his shabby room.

After hearing news about their plan going smoothly, Doctor White went to the pub to celebrate his accomplishments. Eating good food while playing hookers, White felt like he is the king of the world. But immediately hit by cruel reality when he took a step in his lab.

Other than this shabby lab he had nothing. This year he reaching 45, but he had no family or anything worth calling life.

"Heh."

Mocking himself for his naivety, White walked toward his room with unsteady steps then he noticed A5 looking at him. Maybe it is just his speculation, but he felt A5 looking at him with curiosity.

From day 4 Doctor White knew there is something special about A5. It really understood his word and followed his word obediently. Maybe due to alcohol getting his brain or from this atmosphere Doctor White wants to let out everything.

'To think I am this desperate.'

Sitting in front of A5's cage White spoke.

"Hey, A5 do you know why someone like me who created these two miracle drugs sitting in the slum ?"

"You wanna know right ?"

"Say something!"

'This drunken idiot.'

Seeing the doctor's tantrum, Yuriko couldn't help but reply to him with a squeak.

"Squeak."/See I replied./

"Yes, yes."

"It is because of Zera and that Jioral empire. Just because, I can't use magic they will see me as something lower than human. See this red eye !"

Said White pointed his one red eye.

"It is done by some child when I was young. Thinking he is genius by creating some mixture by mixing some good herbs all together and he dropped on my eye. Because of that, I lose my sight on this eye. And do you know after many years later he apologized to me as if he has done something light as a prank? Do you know what he said ?"

At this time Yuriko noticed the doctor's voice becoming more hoarse as he said.

"Oh, White it is been while. Also, I am really sorry about your eye. Tonight, I pay your meals can we make it even."

"FUCK! But you know, I endured it because I finally entering Zera's research institute. Finally, I will not be treated as some bug but I only upgraded from bug to dog. "

"People say Zera is genius but I tell you he is nothing but Swingler, cheater."

In the middle of its sentence, tears ran down the old man's cheeks.

"Zera's patents owned by Jioral empire, every time we try to create something there will always patent or something better one. I couldn't escape his curse every time, I try to create something there will be always empire waiting standing there with a cursed patent witing for a moment to take my own idea as their own."

"The only thing I have done is to help the empire to create something under Zera's name. There is only Zera and no one else. If ideas are something like the food then that motherfucker already spat every food he saw."

"It is unfair~."

Suddenly White felt something soft around his hand and saw A5 slapping his hand with her soft paw.

"Squeak"/Now, now I get it and now go to bed you tired./

"Getting comforted by a rat. Heh."

Just for this night Yuriko decided to let this crazy old man play with her fur.