Once you a hero always a hero, once a thief always a thief, once a killer always a killer, once a stalker always a stalker, once a abuser always a abuser, once a rapist always a rapist, once a saviour always a saviour, once a pedo always a pedo and once a giver always a giver.

This the story of a girl who went from being a total sweetheart to a killer machine, she knew in her heart that it is the right thing to do to help those who are suffering in the hands of the cruel world that we all live in.

*ALARM CLOCK*

"Karina! Get up! You're going to be late for school!" shouted the mother.

The beautiful teenager gets up in a bad mood since she hates going to school, she's a high school student and her mother re-married a rich man after Karina's biological father was killed by a group of gangsters, her step father has an only son who is 5 years older than her.

"Quickly child! You're going to be late!" her mother hurried her daughter.

Karina only drank water and headed towards the door to leave for school.

"Aren't you going to eat your breakfast?" her mother asked.

"I'm not hungry". Karina replied bluntly.

With that she left the house without another word leaving her mother worried, she then arrived to school in her sports car with her group of friends waiting for her.

"What's up". Karina greeted her friends.

"Hey there Karina dongsaeng". Taehyung greeted Karina with a hug.

"Omo we were about to leave you behind you punk". said Amber.

"But she's here anyways". said Jimin.

"We all know that Karina-ah hates school". said Irene.

"Next year is our last of school and Karina-ah still have 2 more years of high school". said Hoseok.

"Nae and she will most likely bunk off school". said Wendy.

"Aish... Does this mean that we have to come here to make sure she comes to school?" Yoongi asked.

"Nae looks like it". Joy replied.

"Aigoo, you sure are a case Karina-ah". said Jin as he ruffled her hair.

"Yah have you all forgotten that I finish my senior year at the same time as Karina-ah!" exclaimed Yeri.

"Opps we have forgotten about the baby over here". said Namjoon pointing to Yeri.

"Omo why are we all stressing out over this?" Seulgi asked them.

They all shrugged their shoulders and went inside the school building and all of the students started to fangirl/fanboy over them, since they are the Kingkas and Queenkas of the whole school. The girls nearly fainted when they saw Karina with her shades on making her look cool and chic, the fanboys always put love letters in her locker and same goes for the rest of the girls. They all arrived to their respective class and Karina sat in the back of the classroom and puts on her headphones on since she's way to smart to listen to the teacher so she usually take a nap.

~SKIP SKIP SKIP LAST LESSON OF THE DAY AT SCHOOL~

*SCHOOL BELL RINGS* *YAWN* *PHONE RINGS*

"What do you want?" Karina bluntly said as she answered her phone.

"YAH IS THIS THE WAY YOU ANSWER TO YOUR OPPA?!" yelled a male voice.

"Who's this? How did you get my number?" she asked bluntly.

"YAH YOU PUNK! IT'S ME!" he yelled again.

"Sorry me I don't have time for pranks bye". she replied bluntly and hung up on him.

"Karina-ah let's go". said Yeri with a cute smile.

Karina and Yeri met up with the rest of the gang for their after school club.

"Any news?" Karina asked.

"No not yet". Amber replied.

"I have". Taehyung suddenly spoke up.

"Okay tell me TaeTae". Karina looked up at Taehyung.

He then gave Karina the tablet, and it was a video call from a mother and her two little twin daughters.

"Are you Karina?" The mother asked.

"Nae I am she". she replied.

"I heard that you protect defenseless people you can't fight back against bad people". she continued.

"Yes it's my job to protect those who are running danger". Karina gave a gentle smile.

"Please help me and my children". the mother started to weep.

"What's wrong?" she asked all worried.

"I feel that someone has been stalking me for the past 2 months now and I'm really scared". the mother continued to cry.

Karina and the whole Kingkas & Queenkas gang all looked up at each other and nodded.

"Listen let's exchange numbers so if anything does happen you can give me a call, arasseo". Karina gently tell the family.

"Oh thank you so much how can I repay you". the mother replied with happy tears.

"Don't worry miss what matters is that you and the kids are protected". Karina replied to the mother.

"Thank you and you're really pretty unnie". said the twins.

"I think you are really pretty too girls". Karina chuckled at their cute statement.

After the video call was over, Karina went back in her blank expression.

"Jimin you know the drill!" Karina ordered.

"Roger". Jimin grinned cutely.

"Amber! Irene! Prepare the weapons with Yoongi!" she ordered them.

"Yes miss". they sang.

The rest of the gang all started to work with the phone calls and preparing the weapons. After they all finished they put all of the weapons in the back of Karina's car and they said their goodbyes and Karina just drove home. As soon as she entered to her home she saw her worried mother, step father and an angry step brother.

"Karina! Where were you?!" her mother exclaimed in her worried voice.

"After school club". Karina replied in her blunt tone.

"Aigoo! You've skipped that to greet your brother who just came here to pay us a visit!" her mother scolded her daughter.

"Aish, whatever. I have work to do". Karina sighed deeply as she walked away to her bedroom.

"I really don't understand your job, you're only a high schooler". said the step father.

"My job? My job is to save and protect defenseless mothers with children who can't fight back". she replied with her blank expression.

As she was walking away a tall guy stopped in front of her.

"YAH YOU BRAT! HOW DARE YOU BE RUDE TO YOUR OPPA?!" he yelled at her.

Karina simply blankly looked at the guy and made a salute wave.

"Oh hi Jungkook-oppa and I didn't see you there". she said in her blunt tone leaving her step brother speechless.

Karina went inside her bedroom with her phone in her hand got changed in her fashion clothes usually wears which is an Nirvana oversized t-shirt with a pair of jeans, she went to the dining room to eat dinner with her family.

"Soooo... um Kairna-ah how's school?" the step father asked her.

"Good". she replied.

"So anyone you... like?" her mother asked.

"My friends". she replied,

"But any boy you like?" her mother corrected herself.

"Mum I don't have time for boys". she replied bluntly.

"Yah what's with her?" Jungkook asked his step mother.

"Like I said before ever since she started to train herself and started her job... she became a different person". the mother replied.

"Oh I see..." Jungkook nodded his head and just stared at his step sister in a special affection.

A month had passed and Karina was communicating with the twins to check up on the family's safety, one night she was at the mansion's gym working out and Jungkook came in.

"Karina-ah what are you doing?" he asked her.

"Kick boxing... wae?" she replied while sweating.

"What happened to you?" Jungkook asked.

Karina stopped and looked at her step brother.

"Someone who is not naive about the surrounding of this cruel world". she replied back as she sat down to drink a bottle of water.

Jungkook simply just stared at her, he has feelings for his step sister but Karina doesn't feel the same she just see him as her brother that's all to it. She then got up and left the gym to take a quick shower and got dressed in her onesie, she went downstairs to have dinner with her family as they were eating Karina's phone started to ring and she then fished out her phone and a gentle smile came across her face it was a smile that her parents haven't seen for many years.

"Hi there babies". she said as she answered as she put it on loudspeaker but there was a long pause causing a heavy atmosphere. "hello?" she greeted again.

"Unnie". one of twins answered crying.

"Hey puffball what's wrong?" she asked.

"It's eomma..." she replied back between sniffles while the other twin was crying.

"What's wrong with eomma?" she asked worried.

"A evil man came in and started hitting eomma". the twin answered.

"Where are you two?" Karina asked them.

"We're hiding in eomma's bedroom". the twin replied.

"Okay you two must hide in the closet until I get there, arasseo". said Karina.

"Nae unnie, please help us unnie". said the crying little twin girl.

"Don't worry I'll be there and whatever you do don't make a sound". said Karina.

They finished call and Karina quickly finished eating her food and rushed upstairs to get changed, after she quickly got changed she fished out her phone to call her friends and Taehyung was the last one to call.

"Hello?" answered a happy boy.

"It's happening TaeTae get all of the equipment ready and meet all of us at the Ms H/N front house I will send you the address and don't be late". she ordered.

"Yes captain". Taehyung replied.

As she rushed down the stairs Jungkook stopped her.

"Where are you going at this time?" he asked her.

"Meeting up with my friends we got a job to do". she replied.

"I swear I will kill you if you have a boyfriend". a warned her.

"Are you dumb?" she flicked his forehead which was a strong one too making Jungkook to let of his sister as she walked out of the door a went inside her car.

Jungkook decided to secretly follow her and saw a group of young teenagers waiting for her and he simply parked his car somewhere where he can watch his sister, he then saw her car.

"Hey guys, got the stuff?" Karina greeted friends and asked Taehyung.

"Ah nae dongsaeng it's all here". he replied.

"Good let's rock'n'roll". she clapped her hands.

With that all of the gang all split up leaving Karina alone, she knew what to to do, she checked the whole house and saw an secret entrance and she entered without making a sound. She then heard a cry from the mother of the twins plea in try not to touch her... the mother of the twins was about to get rape. Meanwhile Jungkook was left in shock seeing a gun in Karina's hand, he then got out of the car and went to the house and saw a rope that was hanging from the second floor of the house and he went up, as he reached the dark bedroom he then heard two children crying in a closet he then opened the closet and saw two little frightened girls.

"Are you going to hurt us?" one of the twins asked him.

"No I'm going to hurt you". he replied as he got to their level.

"How will we know that you're not going to hurt us?" the other twin asked him.

"Because I am Karina's older brother". he ruffled their heads.

"Are you pretty unnie's oppa?" the twins asked together.

"Nae I am". he replied with a smile.

"Oppa I'm scared". the twins said with teary eyes as they hugged Jungkook.

"Arasseo oppa is here". he said as he stroke their heads.

Meanwhile the man was ripping off the mother of the twins clothes to rape while she was crying really hard trying to make him stop but it was no use since she is much weaker than the man and couldn't fight back, he was about to hit her again until he heard a clicking sound it was Karina with a gun in her head.

"Let her go". she coldly spoke up.

"Why should I she's mine". the man evilly laughed.

"She kept on crying out to stop". she replied.

"I won't stop". he bitterly said.

"You better stop before I blow your brains out". Karina warned the man.

"As if... I know you ain't gonna do it". he laughed.

Karina made a signal for the mother of the run to her bedroom and she did what she was told, Karina made sure that the door of the bedroom was closed, she then looked that the guy and smirked.

"So you think I ain't capable of shooting, right?" she asked the man.

"All women are the same". he replied.

Karina then pointed her gun to the man's feet and shoot it earning the man a scream.

"Are you sure about that?" she asked him.

"You bitch! I will sue you!" he yelled in pain.

"Sue me for all I care about". she replied coldly and shoot another feet making the man scream.

"You'll pay!" he screamed at her.

"Ah we'll see about that". she said as she took out her phone and called her two cousins who is are in the police force.

Karina then tied up the man on a chair and waited for the police to arrive. As soon as they arrived the police officer paid and thanked Karina for the hard work. The mother and the twins then came out of the bedroom to hug Karina and Jungkook just looked at his sister on how much she has changed after he left for university and the family business that his father wants him to inherit.

"Pretty unnie!" the twins call out to Karina while crying as they hugged her.

"Babies!" she replied back with a smile that Jungkook misses so much.

"Thank you unnie!" one of the twins cried out.

"No thank you, you two were really brave calling me on my phone because if you haven't called me your eomma would be hurt". she smiled and ruffled their heads.

"How can we repay you Karina-ssi". the mother of the twins thanked Karina between sniffles.

"What matters the most that the three of you are safe". said Karina with a grin.

"Thank you so much". said the mother of the twins.

"Here". Karina said as she handed her an envelop that was filled of money.

"Oh no that was the police officer payment that he gave you". she protested.

"Don't worry I'm a rich kid and you need it more than I do". said Karina said with a gentle smile.

After the police force left the rest of the gang came in, they saw Jungkook and the boys all went to hug him.

"Our maknae!" they exclaimed happily as they all went to hug him.

"Hey". he awkwardly greeted.

"Long time no see cowboy". said Amber with a smile.

"Ah nae". he replied shyly.

"Aww so cute". the rest of the girls all sang.

He simply just blushed at their statement until Karina interrupted.

"Some things never changes". said Karina sarcastically as she took out a cigarette and went outside.

Jungkook was shocked to see his sister smoking.

"Yah since when does she smoke?!" Jungkook asked in shock.

"Aish this brat... she's been smoking for years now". said Yoongi with a sigh as she patted on Jungkook's shoulder.

"For real?" Jungkook just face palmed himself.

"And she drinks too". Taehyung whispered into Jungkook's ear.

"Bwo?!" Jungkook exclaimed.

As they all headed out saying goodbye to the mother and the twins, Karina then turn the small family and smiled and waved at them, she then turned to light up her cigarette and Jungkook stopped her as she aproached her car.

"What are you doing?" she asked him.

"You punk smoking is bad for you!" he scolded her.

"Ah really?" she rolled her eyes at him.

"Yah! Did you just rolled your eyes at me?!" he widen his eyes.

"Ah just move I'm old enough to do whatever I want". she said as she pushed him.

"Oh really like what?" he rose a brow.

"Anything that is none of your business". she replied to Jungkook with a frown.

She went inside of the car and drove away leaving Jungkook on his own yet again, he simply just sighed in fustration.

"Only if you knew how much I love you Karina". he sighed deeply.

Okay this was the first chapter for Karina and tell me how it is looking and yes this story will be a different type of mature story so don't expect a smut chapter with Jungkook since I don't have the ability to write them. So if there's something you need tell me if I have to improve in some areas please let me know as always I love reading the comments ^w^