"Yui you bitch....I'll kill you...."

"I won't forget the day of what you've have done to me...."

"I'll will put you into so much pain, just like how you put me through...."

It's been a dark painful life for Emi Komori who was neglected and ridiculed by the church and has resentment towards Yui due to her gaining attention from the church. Once she has turned ten, her life gets even worst when she and Yui were attacked by wolves, they both ran into the woods, but then Yui did something that was unforgivable.

"Yui! Help me! I'm drowning help!"

Emi cried helplessly towards her sister as she rans away from the wolves.

"Yui please help! Yui!"

She cried once again but no avail, she didn't turned to face her. As she keeps on running away, Emi became shocked to see Yui leaving her to die.

No, this can't be happening....I'm going to die, I'm gonna die in the bottom of the lake. Yui...how could you....

She said to herself as she thought she was going to be dead, she finds herself losing her breath where she falls into a deep dark bottom of the lake she slowly closed her eyes feeling lifelessly giving up.

She thought she was going to be dead, she thought this is the end of her life, however, she find herself breathing. When she wakes up in the middle of the forest, she became surprised and confused until she heard a mysterious voice.

"How did I-"

"Well well, so how are you feeling Emi?"

The mysterious voice asked as she turned around to see a mysterious man with white hair and red eyes. He is handsome as hell and wears a dark suit with a dark red cape.

"W-Who are you and how did you know who I am?"

She asked curiously as he lightly chuckled at her question, he kindly offered his hand to her and politely introduced himself.

"My name is Karlheinz and you're going to be my apprentice."

He said kindly as she looked at his hand carefully, she looked up to him and asked him.

"...Why? I don't even know you."

She said distrustfully as he frowns at her response, he then revert back to his kind demeanor.

"You may not, but you will soon."

He said as he chuckles menacingly, she soon felt pain in her chest.

"Gah!"

She yelps as she holds her chest tightly, she finds her mouth dry as hell.

"...What...did you...do to me?..."

She asked while still in pain, Karlheinz retorted her question.

"Oh I didn't do anything Emi, see for yourself."

He said as she looked at her reflection to see her eyes now red and has fangs, she became frighteningly shocked by her sudden appearance realizing that she's now a blood sucking vampire.

She then turns around glaring at Karlheinz angrily yelled at him for her resurrection.

"Why did you turned me into a hideous monster?! You should've leave me to die!"

She angrily growled as Karlheinz sighed exhaustedly, he calmly assured her.

"I didn't let you die because you're a very interesting person to know about."

"I'm not a person no more, I'm now a blood sucking vampire no thanks to you!"

She snarled as he lightly frowns at her hostility, he then calmly told her about her decision.

"I'm aware you're no longer human, but I do want you to choose before I give you a gift. Do you want to be my apprentice or not?"

He asked seriously as she looked at him intently, she reluctantly nodded where Karlheinz grins at my decision.

As he lifts her back up, he then gave her cranberry juice which she quickly accepts as she drinks heavily, she finds herself healthy again.

After she's brought herself back to health, she then looked at Karlheinz intently and accepts his offer.

"...I'll accept your offer for one more thing: you must never call me by my former name. For now on, you will call me by my new name, Yukina Knightwalker."

After she finally accepts his offer and changed her name, Karlheinz smirked widely as nodded at her new name.

"As you wish, Yukina and while I trained you to be a vampire, I want you to keep your life as an assassin private from my six sons of mine especially my three wives and my brother. If you do, I will give you everything that your heart desires."

"Then trained me then, trained me to be a stronger woman, trained me to be a brutal vampire that I am now, and most of all, give me all the bloodshed that I want to create so I can put on others before they put on me."

After she vows to be stronger, Karlheinz then offered his hand to her. As she immediately accepts his offer, she and Karlheinz teleported to the mansion where her deadliest bloody training begins now....