It's a bit longer than usual which I am happy for. I actually have a plot that I could use, but I'll see how it goes. I hope you enjoy!

Disclaimer: I don't own Cardfight Vanguard.

Kai Baby-sits

Chapter 4: Names, school, and Vanguard.

"ACHOO!"

"See?"

"But you can't leave!"

Kai sighed. He's been doing that a lot lately. "Look, I can't miss school."

"Yes you can!" Mana shouted, pulling his arm.

Kai exhaled. "I won't be that long. You're going to have to get used to this." Seeing as this won't be the only time I may have to leave her, Kai thought, knowing how hard that would be.

"B-but..."

"You'll be fine," Kai patted the girl's head. "Okay?"

"...Okay," Mana slowly let go of his arm. "But, you have to make another cake!"

"Right," Kai scratched the back of his head. "I'll see you later."

Mana watched him walk out the door, shutting it behind him.

"Nothing's gonna happen. Nothing's gonna happen," Mana murmured to herself. She decided to take her mind off of it by eating the breakfast Kai had made for her. As usual, it was delicious and as usual, Mana wanted more. She was pleasantly surprised when she saw another plate of food on the counter.

Mana smiled as she ate her eggs. "He's actually really sweet."

Once she finished her food, Mana sat paced back and forth. What to do? What to do?

"I'm so bored!" Mana threw herself on the couch. "Achoo!"

Mana took a tissue and blew her nose. "Dumb cold."

After another five minutes, Mana had enough. "I'm going to drag him back!"

She quickly opened the door and ran out. Walking down the sidewalk, Mana suddenly thought this may have been a bad idea. She had never once walked outside by herself. She quickly glanced left and right. Mana continued to do so until her eyes landed on the infamous teenager.

Mana quickened her steps and was about to call out to him when he reached the school. Mana stopped. There were far too many people for her liking. She did not feel obliged to cause any attention, all of which was unwanted.

Mana thought carefully about what she should do. Deciding on an idea, she quietly followed Kai, hoping to go unnoticed. Unfortunately, it was not normal for a little girl to walk straight into a high school. A teacher stopped her.

"Excuse me? Are you lost?" the man asked.

"U-uh, w-well..." Mana stopped stuttering when she realized he could help her. "I-I'm looking for someone!"

"Who?"

"He's...!" Mana stopped. She suddenly realized that she had never once called him by name. He had never introduced himself either. Now that she thought of it, Mana did not even know what his name was. It put somewhat of a guilty feeling inside after everything he did.

"Yes?" the teacher now looked skeptical, as if Mana was just lying.

Uh oh.

Kai tapped his pencil on the desk. When would this be over? Kai would normally lose himself in his thoughts, but lately that's been filled with a bratty little girl. Kai sighed. He was over thinking this. She was probably just watching TV in her room.

"Kai Toshiki!"

Said student turned to the teacher. Kai did not like where this was going.

"What did I just say?" the teacher asked, tapping his foot.

Kai would have banged his head on the table in annoyance if the class was not looking. Of course he had to hear everything else but that part. Kai suddenly felt a light tap on his foot. Taking a quick glance down, Kai saw a paper. He read it over quickly.

"We are going to have a test next week," Kai said, turning to his teacher. He almost smirked at the teacher's enraged face.

After the teacher turned around, Kai looked to his right. "You did that, huh, Satoshi?"

Satoshi mirrored Kai's smirk. Two strands of his smooth black hair were braided on equal sides. His eyes were dark blue.

"Heh, now you owe me two times," Satoshi smirked. "Why don't you skip? You don't have a sister like me, Toshiki."

Kai laughed a little. The two were close and had known each other since they were kids. Although, Kai did admit he never said Satoshi could call him by his first name. Satoshi would just never listen.

"No, but I can do without the teachers' on my back."

"That guy has something against you," Satoshi chuckled, pointing to the teacher. "What'd you do?"

"Nothing in particular," Kai responded slyly. Before he could explain, a yawn escaped his mouth.

"There's something wrong with your brain. How many naps do you take a day?" Satoshi teased.

"I've been busy."

"With what?"

"Well..."

The bell rang, interrupting the two. Before the students could escape into the halls, a teacher walked in, a little girl beside him.

"Do you see him?"

"Um..." Mana looked at all the faces until she landed on the right one. "You!"

Kai blinked at how she yelled at him. What was she doing here anyway?

Satoshi elbowed Kai. "Who's she?" he whispered from the side of his mouth.

"She's..." Kai realized he had never once addressed her by name. "Miwa's little sister."

"Didn't know he had one," Satoshi commented. "How is she?"

"Wonderful."

"We are leaving!" Mana shouted, walking up to Kai. That caught the attention of the class.

Kai sighed. He was going to have to explain it all to the teachers. Figures.

After Kai had told them everything, the teachers decided Mana would be allowed to stay, so long as she did not cause trouble. Once that was over, Kai walked up back to the little girl.

"What are you doing here?"

"I was bored!" Mana exclaimed. "So, are we leaving?"

"No, you are staying here."

"What?!"

Kai took her hand and dragged her down the hall, ignoring all the stares as well as the girl's shouting. He managed to reach the next class in one piece.

Kai sat on a chair, Mana sitting next to him.

"Aren't you cheery," Satoshi said, sitting beside him.

"Shut-" Kai quickly realized how bad it would be if Mana knew that word.

"When are we leaving?" Mana complained.

Kai pushed his pencil so hard into the paper the lead broke.

"Oi, take it easy," Satoshi sweat dropped. "Just try to ignore her, Toshiki."

"This is SO boring!" Mana yelled, causing everyone to stare.

Kai glared at his friend, his eye brows twitching angrily.

"You're tired, aren't you?" Satoshi smiled a little.

"How'd you notice?" Kai muttered sarcastically.

"Achoo!" Mana sneezed.

"Kai Toshiki, I hope you're responsible enough to keep her quiet," the teacher said sternly.

Mana blinked at the mention of his name.

"Yep! He's perfectly capable!" Satoshi gave a nervous grin, holding a glowering Kai by the arm. "What are you doing?!" he whispered harshly.

"I'm going to give him a piece of my mind!" Kai muttered darkly response.

Mana sneezed again.

Kai stopped what he was doing and offered her a tissue.

Mana took and blew her nose. She flinched somewhat when she saw Kai's icy glance. She was not able to think about it further since class started. Mana kept quiet after that. She wondered if she had gone too far.

"Oi, Toshiki?"

"Huh?" Kai blinked, almost finding his head down on the desk. "Hmm?"

"Don't fall asleep and leave me alone in this boring place," Satoshi laughed, lightly patting Kai's shoulder.

Mana blinked at how sleepy Kai looked.

Kai sighed, rubbing his eyes. "Then why'd you come?"

"You HAVE met my sister, right?"

"She seemed fine."

"I don't know what you're definition of FINE is," Satoshi gave an incredulous look.

"Just let me sleep," Kai groaned.

"Keep quiet back there!"

Both boys sighed. It was going to be a long day.

Mana went ahead of Kai, happily skipping about. It felt good to finally be out of the school.

"I want to play at the park!" Mana announced. She was surprised when Kai offered a small smile and agreed.

Kai let Mana run around while he laid down on the bench. It felt amazingly good to nap here after so long.

Mana laughed happily, running around. She stopped when she saw Kai lying on a bench with his eyes closed. Walking closer, she realized he had fallen asleep. Mana actually felt a little guilty. She never thanked him for everything he did.

Mana sat on a patch of grass next to the bench. She decided to let him sleep for awhile. He deserved it after all. Mana patiently waited until she thought he had gotten enough sleep.

Mana stood up and turned to the slumbering boy. Should she call his name?

Mana lightly pushed Kai's shoulder. "Toshi-nii?"

Kai slowly opened his eyes and sat up. He yawned. "Sorry, guess I fell asleep."

"That's okay, Toshi-nii."

Kai stiffened. "Wh-what?"

"Toshi-nii," Mana said, blushing slightly. "What's wrong with it?!"

"Uh... nothing," Kai said, a little surprised, his eyes slightly wide to show it.

"Hey! You never called me by my name!" Mana shouted.

"Guess I haven't," Kai rubbed the back of his neck, standing up. "Are you ready to go home, Mana?"

Mana blinked before smiling. "Of course! You owe me a cake!"

"As well as medicine," Kai said with a smile.

"No! No, no!" Mana yelled.

"Well, you haven't been sneezing as bad as before," Kai said, thinking carefully.

Mana got excited. "So I don't have to-"

"Let's see how you are tomorrow."

"Oh, come on!"

Kai chuckled. He was getting used to her bratty attitude.

"Meany," Mana huffed.

The two walked in silence for the rest of the way. Mana's stomach suddenly growled.

"I didn't have lunch!" Mana exclaimed.

Kai fought back the laugh that was threatening to escape. "Why didn't you say something earlier? It's almost dinner time."

"Because I didn't know!" Mana shouted in outrage. "You owe me two cakes."

"Just don't forget who's the one that puts stuff in there," Kai said with a smirk.

Mana froze. "What kind of stuff?"

Kai smiled. He was never into messing with people, but he could not resist this one. "I don't know."

"What?! What's in it?!" Mana demanded.

"Well, let's see," Kai struggled to hold back his laugh. "W-"

"Kai?"

Kai stopped walking and realized they had just passed Card Capital. Misaki stood at the entrance.

"Tokura."

Mana looked from Kai to Misaki and back to Kai. She wondered who she was.

"It's been awhile since you have been here," Misaki stated, walking in the shop.

Kai walked in, followed by Mana who curiously looked around.

"Kai-kun!" Aichi greeted the brunet.

"Yo, Aichi," Kai waved at the bluenet.

"Who's the girl?" Naoki asked, pointing to Mana.

"Miwa's little sister," Kai responded.

"So, you're watching her?" Misaki asked with a gentle smile.

Kai rubbed the back of his neck uncomfortably. "More or less," he mumbled.

"That's right. Miwa is on a trip with his parents, right?" Kamui recalled.

Mana's face saddened when he said that. "I know that!"

Everyone stiffened at the volume of her voice.

"What about the cake?!" Mana demanded, pointing at Kai. "I didn't have lunch remember!"

"She's a brat," Misaki whispered to Kai. "Shouldn't you tell her something?"

"It won't do anything," Kai sighed.

"And quit speaking to your girlfriend!"

...

Kai and Misaki both moved away from each other. Everyone gaped at the girl before looking at the two.

"Hey, now that I think about it, Kai speaks a lot to Misaki," Naoki whispered to the others.

Kamui's mouth dropped. He could not imagine Kai and Misaki being together.

"Naoki-kun!" Aichi blushed at where this was going.

Morikwa laughed at it all. "So have you kissed yet?"

Misaki turned to him with her infamous glares, cracking her knuckles.

Mana watched the horrid scene of Misaki beating Morikawa up. "Your girlfriend is scary."

Kai's eyes twitched, an evident blush on his face. NOW he could see the resemblance between her and her brother. Both were idiots!

"She is not my girlfriend," Kai muttered through grinding teeth.

"What's that?" Mana was quick to lose interest and pointed a deck of cards.

"Vanguard," Kai stated, happy to move away from that topic.

"What's Van Gad?" Mana asked, struggling to say the word.

Kai blinked. "Miwa never told you?"

"Huh? No, he didn't," Mana said, cocking her head.

"Alright, I'll teach you," Kai said after a moment's thought.

"Really?" Mana's eyes sparkled.

"Sure. Here," Kai handed her his old Kagero deck. "Treat them with care."

Mana carefully took the cards and looked through them. "They look cool!"

Kai smiled. "Let's start, shall we?"

Kai carried a sleeping Mana on the way back. He smiled, remembering how she kept insisting she wanted to continue playing. In the end, she had fallen asleep, and Kai decided not to disturb her.

"Toshi-nii?" Mana yawned, rubbing her eyes.

"We're here," Kai stated and opened the door. He set the girl down and locked the door behind him.

Mana stretched. "Toshi-nii, can I have dinner now?"

Kai smiled and patted the girl's head. "Sure, why don't you change for now?"

Mana nodded and walked to her room. She showered and changed into her pajamas.

Kai knocked on Mana's door. When no answer came, he walked in. Mana was asleep on her bed, hugging her pillow close to her.

Kai laid the plate of cake on her nightstand. He took a quick shower and lay beside the girl, careful not to wake her.

Mana immediately attached herself to his arm.

Kai blinked, surprised. Slowly, he patted the girl's head.

"Toshi-nii," she murmured with a smile.

"Toshi-nii, huh?" Kai whispered to himself, a small smile on his face. Guess he could get use to this.

So Mana was introduced to Vanguard. Sorry, I did not go into it further. I am not skilled in writing Cardfights, especially since it's a little girl.

Review if you want.