A/n: I've had this story in my head for a very long time, replaying over and over in my head. The origin of the story, I have no idea. It just popped up one day and I never got a chance to write it down. Until now.

Warning: Language, violence, and mature themes.

Disclaimer: I just own my OC, the family, and the plot.

Chapter 1: This Mysterious New Girl

It's a cold, winter morning and the Day Class is livelier than ever. The Headmaster announced that a new student is arriving that morning and to make sure to make that person feels welcome.

"I wonder who this new person. I hope it's a cute boy, like one of the Night Class students." A Day Class student says.

"I want it to be a girl." Another student says.

"Me too! Me too!" A male student agrees.

"Calm down everyone!" The teacher yells over everyone. "Now, Miss Sakura, you may come in."

A small, petite girl walks in, looking rather shy. She walks to the center of the room and introduces herself. "He-Hello, my name's Sakura Shizuka." She says, a little higher than a whisper. "What? What was her name again? I couldn't hear it." A male student asks. "I think she said Sakura Shizuka." Another student says. "Okay, okay, that's enough everyone. Miss Sakura, you may have a seat in the back, next to Miss Cross. Miss Cross, please raise your hand so she'll know who you are." "Right!" Yuki Cross raises her hand just as Sakura is making her way up to her seat. Sakura then looks around the room, looking for someone. She raises her hand. "Yes, Miss Sakura?" The teacher acknowledges her. "Um…was there by any chance a boy, one year younger than me, right behind me when I entered?" She asks. "No, I don't believe so-" "Sorry, I'm late. I got lost." A boy, around Sakura's height, comes rushing into the room. "And you are?" The teacher asks. "Oh, my name is Timothy Shizuka, Sakura's younger brother." "Timothy? Were you born in America?" A female student asks. "No. My mom wanted an American name for me." Timothy explains. "Oh." "Where were you?" Sakura asks, clearly annoyed. Everyone stares at her, surprised at her sudden 180.

"I got lost!"

"I told you to follow me! Why the fuck didn't you listen to me?"

"I'm sorry!"

"Okay! Miss Sakura?"

"What?" She glares at the teacher. "Um…pl-please watch your language from now on." He says, scared for his life. "Oh, okay." She says, smiling. "What the hell's with her? Is she bipolar?" A student asks another. Sakura turns to the student and with a cold smile says, "No, I'm not, but I'd appreciate it if you'd refrain from talking bad about me behind my back, comprende?"

"Y-Yes ma'am."

"Good."

"Miss Sakura, please take your seat and Mr. Timothy, please take a seat next to Mr. Kiryuu." Sakura takes her seat. Timothy goes up to his seat next to Zero Kiryuu, who doesn't look too happy about the seating arrangement.

"Now, without further interruption, let's get onto today's lesson. Today we are dealing with…" The teacher starts his lecture on the quadratic formula.

"Psst, Yuki is it?" Sakura asks the girl next to her.

"Yes. What is it that you need?"

"What day of the week is it?"

"It's Wednesday." She replies and turns back to the teacher.

"Shit." She swears under her breath. Only two more days and I was hoping on staying until the beginning of next week. Damn.

Sakura opens up her notebook and starts taking notes. I should enjoy these two days to the fullest then.

Two days later…

"Hey has anyone seen Sakura today?" A student asks her friend.

"No I haven't. Is she sick?" Her friend asks.

"Wow, it's only her third day here and she's playing hooky. She must hate this school already." Another student says.

"No I don't think that's it. I've heard a rumor that she transferred to the Night Class." One student, a small girl, says.

"No way!" Everyone exclaims.

"Lucky! She gets to be close to Idol!" About five girls scream in unison.

"Sorry I'm late again." Timothy walks into the loud classroom. Pretty soon, he's bombarded by curious students.

"Timothy, what happened to your sister? Is she sick?" One student asks.

"Timothy, where's your sister?" Another asks.

"Timothy, is it true that your sister transferred to the Night Class?"

"Woah, woah, calm down, everyone. My sister's fine. And yes, she did transfer to the Night Class."

"What?! Why?!"

"Turns out she was smarter than Headmaster Cross thought. So she was transferred, no big deal."

"But don't worry," he adds, "She's coming in a few minutes to pick up her papers for the transfer." Timothy turns to the door. "Ah, speak of the devil, she's here."

Sakura walks into the classroom, wearing a Night Class uniform. "Sensei, I came to pick up the papers Headmaster needs."

"Yes, of course." He goes to his desk to fetch them.

Sakura looks around the room, staring at the awed faces, except for one. She stops at Zero's horrid face.

So, the boy can sense what I am. He must be a Level D. Maybe next month, I'll change him back.

"Here, you go, Miss Sakura." Sensei hands here the papers.

"Thank you. Oh, and may I speak with Zero Kiryuu for a moment?"

"Of course." He turns to Zero, "Mr. Kiryuu, Sakura would like to have a word with you."

Zero reluctantly gets up from his seat and walks to the front of the room.

"Would you please step outside with me Zero?" He follows her outside.

After he closes the door behind him, Zero asks, "Why was someone like you in the Day Class in the first place? It's not like the Headmaster to make a mistake like that?"

"He didn't make a mistake; I did. I miscalculated the days in the week."

Zero looks at her, confused. Sakura explains, "Once a month for about a week, I turn into a human. Most vampire and human girls get cramps and blood during their periods; I get sunshine and no blood. However, there is a catch to it."

"What is it?"

"I keep my fangs and I have the power to turn any vampire into humans during that one week."

Zero looks at Sakura with horror. "Y-You're saying you can turn ANY bloodsuckers into humans, even purebloods?"

"Yes but you will have to wait until next month; I just woke up from my 24 hour powernap."

"24 hour powernap?"

"When I start or stop my 'period', I have to sleep for 24 hours so my body would adjust. So I miss about 2 days a month."

"Why are you telling me all this?" Zero asks.

"Because, earlier, I sensed that you were extremely unhappy and I figured it was about that fact you're a Level D." She tells him. "So, do you accept my offer?"

"One last question."

"Shoot."

"How are you able to…"

"Become a human once a month?"

"Yes."

"I was born with a defective gene that causes this. It's very rare and somehow it runs in my family. My 23rd great grandmother had this."

"Had?"

"She perished in the war."

"How about one month from the 3rd, my dorm?" She changes the subject.

"Okay." They shake on it.

"Though I still find it hard to believe a pureblood can do that."

"I have trouble understanding it as well."

Zero walks back into the classroom and Sakura heads to the Headmaster's office.

"Here's the paperwork, Kaien." Sakura hands him the paperwork.

"Ah, thank you Shizuka-sama." He takes it and places it on his desk.

"Kaien we went over this. Please just call me Sakura."

"I'm sorry. I forgot." He gives a small laugh and asks, "So, how was your three days in the Day Class?"

"It was great! Though I wish I could have stayed longer." She says, excitedly.

"Now you know you can't do that. It's against school policy."

"I know. Well, I'm going to head back to my dorm room to rest up for tonight."

"Okay. Good luck dealing with the Night Class."

"Thanks. I'll need it!" She leaves the office.

"She's such a nice girl. I hope her family's treating her nicely." Kaien wonders. I'm sure she's fine. I need to stop worrying so much.

Sakura collapses onto her king-size bed. Ugh, why do I have to get my own room. I told Kaien that I can share a room with someone but he. doesn't. listen! Might as well try getting some sleep. Tonight's going to be fun! A playful smirk plastered on her face at the last thought as she drifts off into dreamland.

A/n: The first cahpter is up. And if you didn't catch that fact when she was explaining everything to Zero, she IS indeed a pureblood. Please review at the bottom. :D

*EDIT 10/21/2012: I messed up on Zero's last name! Shame on me! Thank you so much Mangafreak666.