Disclaimer: I do not own Yu Yu Hakusho (wish I did though)

This is a Hiei/OC if anyone didn't know.

Also if anyone is wondering this is me, Yoko-Fox, and this is my plot. Except now I am MercilessAngel on FanFiction

The Teacher and the Principle are fictional people who are unrelated to anyone.

Here is just some background info that will prove helpful in well figuring some stuff out:

The OC is Kurama's adopted sister, like the title implies. She's a half ice youkai, half fire goddess. Kind of weird I know. She has coal black hair that falls to her shoulders in a light way with two light blue bangs in the front that are longer then the rest of her hair and frame her face. She has red eyes, but they are different from Hiei's. His are a blood red but hers are darker with even darker red, almost black, flecks. She has healthy skin that contrasts nicely with her red eyes. She has a dark blue tear shaped mark on her left shoulder that is a part of her heritage. She is a nice, energetic, and very protective person. She knows she's a youkai, of course, but Kurama doesn't. Neither does she know about him being a youkai. So that should do it. Her name is Kiyoko Minamino.

Soooo lit the story begin.

Shuichi and Kiyoko were walking to school with Kuwabara, Yusuke, and Hiei. At the moment the Yu Yu Gang was going to her school because they are on a mission, of course she just thought they were visiting her.

Flashback

Standing in a room with pale blue walls Yusuke, Kuwabara, Kurama, and Hiei were awaiting the diminutive demigod from whom they received their orders.

"Stupid baby always making us wait…" Yusuke mumbled angrily and rightly so considering they had been waiting for nearly 20 minutes.

"What was that Yusuke?! What did I tell you about calling me a baby?! I am ten times your elder!" Koenma said with his dramatic entrance, you would think he had been waiting for Yusuke to make a smart comment before entering, which he had been.

Satisfied Yusuke had been reprimand, Koenma began climbing onto his desk, grabbing the black remote he stood on top of the desk in a sad attempt to be eye level with his detective team. He pointed the remote at the wall to his right and a screen lowered from the ceiling. An image of a high school appeared, Kyomai High School.

"Your mission is to infiltrate this school disguised as students and track down a youkai we have discovered is at this school. We don't know if the youkai is hostile and it is imperative-"

"Hey what does impar-e-tiv mean?"

"It means it is very important, Kuwabara."

"Oh"

"Like I was saying, it is imperative that you locate this youkai before it can cause harm. I have taken the liberty of enrolling Yusuke, Kurama, Hiei, and Kuwabara you start Thursday and will be wearing the uniform, dismissed."

… "What!"

"I refuse to go to a ningen school…"

"Well Yusuke, Kuwabara, and Hiei you have no choice." At this Hiei was sorely tempted to pull his lovely katana out and slit Koenma's throat. Instinct guiding, Koenma saw the fury in Hiei's eyes and hightailed it out of there like a bat out of hell.

"So… Kyomai High School is it? ...Hey Kurama isn't that the school your hot sister goes to?" Yusuke, asked once again saying the wrong thing, at the wrong time.

"Yusuke while on this mission you will refrain from hitting on my sister, is that understood?" The protective kitsune growled.

"Sure thing Kurama heehee…"

End of Flashback

So now walking to school Kiyoko saw the sullen look upon little Hiei's, her nickname for him, face. So she decided to cheer everyone up with… singing.

"So… who wants to sing?"

…No answer.

"Fine I'll sing then: This is the song that never ends, yes it goes on and on my friends-"

"Shut up, you baka onna…" growled Hiei.

"Ahhh…does little Hiei need a hug?" she teased.

"Don't... you... dare..."

Ignoring his warning growl Kiyoko pounced on Hiei with vigor and commenced in harassing the angry fire youkai. Yusuke and Kuwabara were rolling on the ground holding their sides laughing while Shuichi/Kurama chuckles because when Kiyoko had pounced on Hiei he had fallen with her on top making for a very indecent position. Hiei was now ready to not kill her, but to torture her without an ounce of mercy.

And like the would-be victim before, Koenma, she turned tail and ran for her life to school.

Kiyoko arrived to her class and dived under her desk for the protection it offered and began to pray that she lived to a ripe old age and saw all of her grandchildren then died peacefully in bed, apposed to being ripped apart by an angry Hiei.

When her teacher saw her quivering under her desk he signed. This wasn't exactly a normal routine but nothing Kiyoko did anymore surprised Mr. Zapp.

"Ms. Minamino please, get out from under your desk."

She shook her head and continues to cower while keeping hawk's eye on the door.

And then it opened…

"Evil!!! Evil!!!" Her screaming echoed around for miles as birds took flight from trees, dogs barked, and squirrels ran away.

"Ms. Minamino there is nothing evil here" Mr. Zapp sighed.

"Yes there is and it has gravity defying hair and murder in its evil eyes. Run for your lives!"

The very thing that had caused her screaming had previously walked in, the principle guiding. Yusuke, Kurama, Hiei, and Kuwabara stood around the doorway. And Hiei still had that malevolent look in his eyes.

Mr. Zapp just shook his head.

"Mr. Heartman what can I do for you this fine morning?"

"Well Mr. Zapp these four young men are to be in your class and I took the liberty of showing them to your room. This is Mr. Minamino, Mr. Jaganashi, Mr. Kuwabara, and Mr. Urameshi. Boys this is Mr. Zapp your teacher here at Kyomai High School. Have fun."

In an act of amusement Mr. Zapp assigned Hiei to sit behind her, evil Mr. Zapp.

At Lunch (4 hours later)

The guys had headed out to lunch before Kiyoko because she had to clean up the mess Hiei had left from throwing wards of paper at her head. Poor misunderstood Kiyoko.

Finally leaving, Kiyoko followed her ears to where she heard the gang situated around a large cherry blossom tree with a lake not far off but was confused to see a certain short person missing.

"Hey guys, where's Hiei?"

Yusuke points up the tree. She tiptoe over quietly and climb up the tree slowly to see little Hiei quietly snoozing away.

-Awww… he's just so cute- Kiyoko thought as she leaned over Hiei till she was level with his ear. Deep breathe.

"Wake up you furry cat hairball!"

From the shock Hiei fell out of the tree somehow jarring gravity back into his hair causing it to temporarily not stick up anymore.

"… I am going to kill you, you little monster…" Uh-oh, scary calm.

So now Hiei was chasing Kiyoko, while she ran for dear life, and Kuwabara, Yusuke, and Shuichi/Kurama were all laughing so hard their guts hurt. And then Hiei caught her…

(Note: Kiyoko is wearing the girls' uniform which is a blue skirt that goes to her knees with silver lining on the bottom with a blue long sleeve shirt with silver around the collar, wrists, and bottom. The guys' uniform is a blue jumper with white lining around the ankles, wrists, and collar.)

Hiei took her and threw her into the lake.

"Hn. Maybe that will teach her…"

"No! She can't swim!" Kurama usually calm now looked ready to strangle someone, namely Hiei.

"Ugh! Why didn't you tell me that?!"

"I was trying…" Splash!

Hiei had jumped into the lake after Kiyoko. Hiei dived deeper and saw her floating there with her eyes closed. He grabbed her and pulled her out off the water. Everyone was standing around her and wondering what they should do when Keiko came running toward the school in a rage. Keiko had decided to visit Yusuke for lunch.

"What happened here?! Yusuke did you do this?!" And Keiko commenced to hitting Yusuke with her bag.

"Stop I –ow- didn't –ow- do this! –Ow- Hiei-" and Yusuke was no longer conscious and with us.

"Yes, Hiei pushed her into the water but she can't swim." Kurama said hoping to stop Keiko from killing his friend.

… To Be Continued…

Translations

Kitsune - fox

Ningen - human

Youkai - demon

Baka - idiot

Onna - woman