Alright. This is a crossover between two AUs that I created. I suggest you read "Kai Baby-sits" before reading this. It's not necessarily obligatory, but it would help a little. Anyway, I hope this has enough cute and fluff to go around. Enjoy!

Disclaimer: I don't own Cardfight! Vanguard.

FLF

Chapter 13: Mana and Toko.

"Nii-san!" Toko went hurling on his sleeping brother's back, making him give a startled grunt.

"Toko..." Kai groaned, pushing his brother off his back. "I told you not to do that. I was sleeping."

"Not anymore!" Toko grinned innocently and kissed his brother's cheek. "Nii-san! Someone's at the door!"

"What?" Kai sat up, looking at the clock. It was 8 o'clock in the morning on the weekend. There was only one person that could be here.

"Let's go, Toko," Kai said, getting off the bed and taking his brother's hand. He made it to the door and opened it.

"Toshi-nii!" Mana jumped on him, forcing him to let go of Toko and hold onto her.

"Mana!"

"She was anxious to see you," Miwa grinned at the startled brunet.

"Nii-san?" Toko tugged on his brother's sleeve.

"Who's he?" Mana asked as Kai put her down.

"He's my brother," Kai stated slowly, still trying to comprehend that Mana was here. This didn't sound good.

"But you said you didn't have any siblings!" Mana exclaimed.

"Uh..."

"Nii-san!" Now Toko had tears in his eyes. He was hurt that Kai was paying attention to Mana and not him.

"Toko, she's just Miwa's sister," Kai said gently, patting his brother's head. When Toko's expression didn't change, Kai picked him up and rubbed his back.

"Sorry," Miwa apologized as Kai let them in. "I didn't know he would be hurt."

"Neither did I," Kai murmured, kissing his brother's hair. "Don't cry, Toko."

"Why's he crying?" Mana asked, pointing at him.

"Mana, not now," Miwa whispered and pushed her hand down.

Mana frowned at that. "What! I just want to know!"

Miwa winced. Kai, you have to teach me how you raised Toko all by yourself and still managed to discipline him.

Kai stiffened when Toko buried his small head in his chest, little sobs racking his back. The little boy always got scared when people yelled, or when he didn't know who Kai's friends were. Toko's feelings were delicate. He could get hurt very easily.

"Miwa, keep Mana here," Kai told the blond sternly before going to his room. He sat on the bed and gently rocked his brother. "Shh, Toko. She doesn't mean to be loud." I think.

"Nii-san, I wanted to be with you today," Toko sniffed, knowing Kai would be around Mana now.

"You'll still be with me, Toko," Kai murmured gently, wiping away his brother's tears. "But Mana will be here too, okay?"

"...Okay," Toko mumbled.

Kai smiled and kissed his forehead before carrying him out of the room. He found Miwa waiting with a very pouting Mana.

"Don't raise your voice too high, Mana," Kai said before she could speak. He gently set his brother down who hid behind his leg.

Mana huffed. "Fine. Anyways, do you have any cake?"

"Cake?" Toko echoed, staring at his brother curiously. His face soon twisted into a happy smile. "You made cake, Nii-san?"

Kai was glad Toko was normal again, but did it have to be because of the topic cake? Mana was already a handful.

"Try his cheese cakes!" Mana grinned, licking her lips. "They really make you want more!"

"Nii-san's chocolate cakes are better!" Toko said, stepping away from Kai's leg.

"Not as good as his strawberry ones!" Mana countered.

Miwa came next to Kai and shared the same blank look as him, watching their siblings' cheerful argument.

"Nii-san!"

"Toshi-nii!"

Both kids came up to the brunet.

"Isn't that true?!" they both demanded, determined looks in their eyes.

"U-uh, well..." Kai wasn't sure how to respond. He blinked when Miwa patted his shoulder seriously.

"As a good friend, I wish you the best of luck," he said before skillfully leaving the house with a quick kiss to his sister.

"Nii-san!" Toko pouted, grasping his leg. He gave him a pout that told him he couldn't disagree.

"I am right, RIGHT?!" Mana demanded, feeling a little jealous.

"...Wh-why don't I test that?" Kai wished he hadn't said that.

"What?" both children blinked, confused.

"I'll make two cakes and see which one is better," Kai stated, feeling a long day approaching.

Mana thought about it. "...Alright."

"I'm okay with that, Nii-san!" Toko smiled and held up his hands.

Kai picked him up and sweat dropped at Mana's infuriated look. He couldn't do anything even if he wanted to. Toko was still young, having just turned six. Kai would be lying if he said he didn't baby him a little (a lot) either.

The brunet led the unhappy girl to the kitchen and let his brother ask away at what he was doing.

"Shh, I have no idea what he does either," Mana told Toko. "It's better to just wait and watch."

Toko blinked before nodding slowly and sitting next to the girl.

Kai was relieved that there wouldn't be any interruptions and started.

Toko waited for what felt like forever before both cakes were placed on the table.

He bit into the chocolate cake while Mana ate the strawberry cake. They both adored the taste.

"I think we'll need to eat it all," Mana grinned mischievously. "Just to make sure."

Toko was less sneaky and instead looked at his brother for confirmation.

"Very funny." Kai disagreed.

The kids forgot about their argument and ate a piece of each cake before Kai put them away. Out of reach.

"Let's play!" Mana declared.

"Can we play, Nii-san?" Toko asked politely, tugging his brother's hand. Thankfully, Mana's attitude wasn't making him forget his manners.

"Sure," Kai smiled fondly at his brother.

Mana huffed. "You never treated me like that."

"Of course he didn't," Toko said innocently. "We're brothers."

Kai gave Mana a warning glance before she could yell. Toko didn't mean to be rude. It was somewhat true. But the main reason Kai babied Toko was because he had to make up for the child not having any parents. That took a lot.

"Mana, are you complaining about the way I treat you?" Kai raised an eyebrow.

"You treat him differently," Mana insisted, folding her arms.

"Because he's younger," Kai replied lightly. "You don't want me to hug you all the time, right?"

"No!" Mana denied.

Kai blinked when it looked like she did. The thought only lasted a second as Toko questioned him.

"Am I bad for wanting to hug you all the time?" Toko asked, his eyes blinking with guilt.

Kai knew Toko would be hurt if he laughed, but it was so hard not to. His brother was just too innocent. It made Kai wonder if he was raising him right.

"No," Kai couldn't hold back a few chuckles. "It's natural for family members to do that."

"Okay!" Toko took that as an initiative to hug his brother.

Mana muttered unhappily.

Kai smiled at her. "Come on, Mana. I'll let you watch TV."

The girl perked up at that and quickly followed the brunet towards the TV. They sat on the couch, and Kai turned on the kid's channel. He already knew Mana's favorite show was on. There never seemed anything bad in it, so Kai let Toko watch it as well.

"Nii-san, the ponies are all different colors," Toko whispered to his brother excitedly, tugging his sleeve.

"They all have specialties," Mana told him happily. She never spent time around other kids her age unless it was outside. She felt happy that she knew someone who was interested in her show.

"What are their names?" Toko asked, interested.

Kai smiled softly. He was glad Toko and Mana were becoming friends. Their attitudes were so different yet they seemed to get along. He silently sat next to the distracted children as he stretched somewhat.

Think I'll take a nap, Kai absently thought as he leaned back on the couch and closed his eyes. He knew he'd need it. The day wasn't over yet.

"Nii-saaan! Why did you take a nap?" Kai heard his little brother's innocent voice in his sleep.

"'I like sleeping, Toko," Kai sighed, sitting up straight before stretching. He turned his head when he sensed someone's angry attitude. "Uh… Did something happen, Mana?"

"Who said anything happened?!" Mana shouted, her face red with anger.

Kai blinked slowly as his little brother clung to him.

"Scary…" Toko mumbled, hugging his big brother.

"I'M NOT SCARY!"

"NII-SAN!"

"C-calm down, Mana," Kai said, wondering why she was so angry as he patted Toko's head. "Why are you angry?"

Mana folded her arms and turned away. "I'm not angry," she muttered (angrily).

Kai sighed, putting Toko down. "Toko, stay here. I'll be right back." The brunet motioned for Mana to follow him. "Come on, Mana. I want to talk with you."

Toko looked between his brother and the raging girl. He wondered what Kai wanted to speak about but kept silent as they moved to the kitchen.

"Mana, do you think you're being replaced?" Kai asked gently, bending down to her height.

"No!" Mana denied, but her eyes were getting watery.

"Mana, Toko lost his parents a year after he was born," Kai said in a serious voice, knowing very well that he was talking about his parents. "He doesn't know what it's like to have parents. I have to make up for that. Understand?"

Mana was crying by now. She wrapped her arms around Kai's neck. "I'm sorry!"

Kai smiled softly and returned the hug. "It's alright. Toko is not that bothered by it anyway." He rubbed the girl's back gently. "Although.."

"Hmm?" Mana blinked, waiting for the brunet to continue. She pulled away from him to see what he was doing. The brown-haired boy seemed in deep thought. "Toshi-nii?"

"Have you ever wanted a younger brother?" Kai suddenly asked.

Mana blinked at the random question. "Huh?"

"Have you?" Kai smiled.

Mana realized what he meant and grinned from ear-to-ear. She was happy that Toko would be her little brother now, but she was happier because Kai had wanted her to be.

"Un!" Mana grinned. "But will Toko be okay with that?"

"He's a little slow about it, but he eventually likes anyone he meets," Kai reassured her. "Just try not to raise your voice," he couldn't help but add.

"I'm not that loud." Mana pouted as they headed towards Toko who was waiting. At that moment, Kai seemed to find it appropriate to cough.

"Hey!"

"See?"

"You made me yell on purpose!"

"Nii-san? What happened? I'm confused... Why are you smiling?"

"I love your tiger!" Mana squealed, hugging Toko's stuffed toy. "It's so soft!"

"Nii-san gave it to me!" Toko smiled. He didn't know what his brother had done, but the blond-haired girl was certainly nicer.

"You're lucky!" Mana grinned, loving the toy.

"There were some toys for girls too," Toko added happily.

"Really?" Mana jumped off Toko's bed. "Then let's ask Toshi-nii to take us there!"

"O...kay." Mana was already out of the room. Toko hurried to catch up with her. "Nii-san!"

The kids found the brunet in his room with a book in his hand. He shut the book and sat up as the kids entered and jumped on his bed. "Nani?"

"Can you take us to buy some toys?" Mana had stars in her eyes that told Kai a no would devastate her.

"Sure, but...why?" Kai inquired slowly.

"She wants a girl tiger, Nii-san," Toko smiled at his big brother. "Please?"

Kai grimaced. Did they both have to put those faces on? He knew he could not say no. "I already said yes," he sighed except there was no annoyance. He slid off his bed.

"Would you like to go now?"

"Mm-hm!"

"Mm-hm!"

"I love it!" Mana announced, waving her female tiger around. She giggled with happiness as she held Kai's hand.

"Nii-san, can we have ice cream?" Toko smiled, holding his brother's other hand.

"Sure," Kai smiled at both of them. They each got an ice cream cone and began to lick it.

"Where are we going, Nii-san?" Toko asked, licking his ice cream happily.

"We're going to the park," Kai stated and received two excited yays. The teenajer sat on his bench and watched the two kids play tag. He smiled as he took the last bite of his dessert. He was happy to see both of them getting along. They seemed to enjoy each other's company now.

Kai blinked as the two came back to him. "Toko?"

"Can you push us on the swing?" Toko asked, though he was already pulling his brother along with Mana helping him.

Kai placed both of them on the swing and lightly gave both a push.

"Push mine more!" Mana grinned.

Kai hesitated but then gave another, stronger, push. He gave his little brother the same gentle push as before.

"More!" Mana laughed.

"I don't want you to fall off," Kai stated as he stood behind both of them. "You can make yourself go faster."

"Okay!" Mana seemed to be in a good mood.

"How?" Toko questioned, his swing moving slowly.

Kai gently took hold of the swing and pulled back. "When I let go, put your feet in the air, then pull them back. Is that alright, Toko?" he asked gently.

Toko was somewhat reluctant. "Not too hard?"

Kai shook his head with a smile. "Not too hard."

"Okay!" Toko smiled. He didn't doubt his brother.

Kai let go of the swing and watched Toko do exactly as he instructed him too. He's a fast learner. Turning to Mana, he saw her doing it on her own. She seemed pretty good.

The emerald-eyed boy decided it could not hurt. He gave her a harder push than before, not too hard though.

Mana did not realize Kai would do it and squealed when she suddenly went higher. "Toshi-nii!"

"You asked, didn't you?" Kai smirked, hands in his pockets.

Mana tried to glare, but it lacked its effect, especially when Toko started giggling. The girl eventually laughed as the wind swung her hair back and forth.

"Toshi-nii is sneaky!"

Kai chuckled, giving her and his brother another push.

"Mana has to leave?" Toko pouted at the blond teen.

"Sorry about that, kiddo," Miwa grinned, patting the little boy's head. "She can come back tomorrow if she wants."

Mana grinned happily. "Okay!"

"But why does she have to leave?" Toko pouted further, lowering his head.

Kai patted the black-haired boy, letting out a small laugh. "Toko, you heard Miwa. She'll come back to play with you again."

"How else would I get cake?" Mana's grin mirrored Miwa's.

"That's not funny," Kai sweat dropped.

Toko giggled, happy again. "I think it's funny, Nii-san."

"Don't worry, Toko," Miwa laughed. "Your brother just doesn't have a sense of humor."

Kai raised an eyebrow and gave a sarcastic smile. "Very funny."

Both of the kids laughed while Miwa snickered. "Alright, we'll see you guys later!"

"Bye, Mana!" Toko smiled and waved.

"Bye, Toko!" Man returned the wave with a grin and left the house with her brother.

"Ne, Nii-san?" Toko called as Kai shut the door.

"Hmm?"

"Is Mana our sister?" Toko asked with hopeful eyes. "Is she now family?"

Kai smiled warmly as he picked up his brother. "Yeah. She's family."

How did you like it? I hope it warmed your hearts. Tell me what you think! Please Review!

Next is romance. I've said this about a million times: I am not good at romance. Help?