(F/n) pov

You just arrive at an old mansion where your sister was supposed to be living. You looked around and saw no one there or anything moving. You wore black jeans black boots and (f/c) that match your (h/c) hair. Along with a long coat that hid both of your weapons on your thighs and your matching cross that your sister has but in (f/c).

"Don't tell me I got the wrong address? Damn that old man!" You yelled as you walked up to the house leaving your parked bike in the driveway. You got your suitcase off the back and walk to the door and knock three times. The door opens and you saw your little sister was the one who opens the door.

"Yo long time no see Yui." You said with a smile. She brightens up and hugged you to see if it was really you.

"(F/n) I missed you so much!" She said as she had tears of joy in her eyes. She let you in and took your luggage but went down with it at the same time.

"What do you carry here bricks?" She said as she got back up while trying to lift it up.

"No that just a few days of clothes. It's heavy for you because you lack physical strength. Anyway is everyone out or something?" She said as she grabbed her luggage from her and swing back to her shoulder.

"Ah no they're home and all but they're busy."

"HEY PANCAKE DINNER IS READY SO HURRY UP!" A certain read head said.

"Who are you and what do you want?" He said as five more showed up in the room.

"The question is who are you to talk to my little sister like that." You gave out an angry look at him.

"Little sister?" The white hair guy said as he looked at you and Yui.

"Oh, sorry guys I forgot to mention that I have an older sister," Yui said as she laughed a bit nervously.

"Ehhhhhhh so little b**** has a sister who would have thought that." And a guy with a fedora hat said with a smirk. He looked a bit like the first guy to insult your sister.

"What did you just say. I dare you to repeat that to my face playboy!" You yelled getting ready to pull out your weapon.

"Enough of this nonsense. I must know how you figured where your sister was." A guy with glasses said as he tries to figure out a way to solve the problem.

"The boss told me and ask me to check up on her." You said as you regain yourself from killing the two who insulted Yui.

"Oh, so you're the person she mentioned over the phone." A blond hair guy said as he lay down on the couch listening to music.

"Shu explain now." They guy glasses said to the blond who's name was Shu.

"A woman called said she'll be sending one of her best hunters to check on the girl. Said don't pick a fight with her unless you want to die. Also do not insult her or the girl or else we receive a pierce heart by her." He said as he kept his eyes closed.

"Is that all?"

"Oh, and she also said try to not get in her way while she's working."

"You better I was given the permission to take down any threat around Yui." You said as you looked at the two redheads.

"I see then we shall prepare a room for you at once. My name is Reiji Sakamaki I'm the second oldest the guy on the couch is Shu Sakamaki the oldest of all six of us. Then we have the triplets Ayato, Kanato, and Laito. And the youngest of the family Subaru Sakamaki." You saw all of them but you didn't trust any of them.

"Tch I guess I have no choice do I. My name is (F/n) Komori I'm Yui's older sister and I'm a hunter."

"A hunter? Do you hunt animals (F/n)?" Yui said as everyone looked at her wondering what she meant.

"Yeah sure let's go with that." You said as you looked away.

"Anyway, I was given this mission because of some problems with your kind. A lot of them are heading towards Yui and of course, I was assigned to protect her as the top hunter and youngest of all of us to actually take care of 'business'. Therefore the reason I'm here right now." She said as she looked at them.

"I see so how long do you plan on staying here?" Reiji said as he fixed his glasses.

"Until the boss calls me back and God knows how long that'll take." You said as looked at your phone.

"Great another useless human to take care of," Subaru said. The next thing everyone saw was a gun in his head.

"Don't think that low on me unlike Yui I have killed many vampires. And not just any weak vampires the ones that take at least three people to take down just one. Consider this a warning to all of you. If I so much see a piece of hair missed place or any bite marks on my little sister then I hope you have a grave ready for some dead bodies." You said as you lowered your gun down.

They all seem to get that you weren't joking around you actually meant it. As Yui showed you to your room you guys talk about what has happened. Her telling you about another family that treated her like an actual person then livestock. Since you were homeschooled because of special reasons Yui told you everything that has happened before she left. Ever since then you would worry that she was happy or safe and didn't deserve this kind of treatment. But one thing is for sure that you'll protect your little sister to the end.