Kiyomi was walking down the hall to her class while covering her yawning with her hand. "Good morning, Kiyomi!" Someone called out to her. She opened her eyes to see Yamamoto running towards her and waving.

She smiled and said, "Good morning, Yamamoto. How are you?" He stopped in front of her and said, "Doing well." Kiyomi liked how Yamamoto always looks so happy no matter what the situation is. She knew that if there is one person to brighten up her day, it would be him.

As they were walking towards their class, they saw Tsuna standing in front of the door with Gokudera standing at the entrance. Kiyomi and Yamamoto walked behind Tsuna as Yamamoto asked, "Oh, you're still playing the Mafia game? Looks like fun! Let us into the 'family' thing too."

Tsuna turned towards Yamamoto and Kiyomi when Yamamoto started talking. "Y-Yamamoto. Kiyomi." 'He thinks it's a game…' Tsuna thought as his face turned slightly blue.

Gokudera held a fist up in front of him. "What? You're after becoming the 10th's right hand man!" He pointed at Yamamoto. "It won't go that easily. The 10th's right hand man is me!" He pointed at himself.

Kiyomi got in front of Yamamoto and held her hands up in front of Gokudera. "Now, now, Gokudera. Let's just forget about all this boss and subordinate stuff."

"Come on, let me into your group. The more the merrier, right?" Yamamoto asked as he turned towards Tsuna.

"Yamamoto…"

"You guys, you're in the way." Everyone turned to the source of the voice and saw Kyoko and her friend, Hana, standing in front of Tsuna.

"Good morning, Tsuna-kun." Kyoko greeted.

"K-Kyoko-chan! Good morning." Tsuna greeted back with a hand behind his head.

"Is this kid your brother?" Kyoko asked after she pointed down at Tsuna's feet. Everyone looked down at his feet to see a little boy holding on to Tsuna's leg. The boy had a giant black afro hair with cow horns sticking out, a pair of green eyes, and was wearing a cow outfit. He had tears coming from the corner of his eyes and snot coming from his nose.

"What?" Tsuna lifted his leg that the boy was holding on to. "Since when?!"

Gokudera, Yamamoto, and Kiyomi looked over Tsuna's shoulder and stared at the boy. "Who is he?" Gokudera asked.

"Oh, it's cute!" Yamamoto said with a smile.

Kiyomi kneeled down at Tsuna's feet and gently picked the boy up off of his leg. She stood up straight and held him in her arms. "Hi there, little guy. What's your name?" She asked with a gentle smile.

"Is it really okay to bring him to school?" Hana asked.

"N-No it's not like that…" Tsuna tried to explain but couldn't. Suddenly, muttering started to fill the hallway as the student backed away to the side. Standing in front of them was boy with short black hair and sharp grey eyes. He was wearing the school uniform with an armband pinned onto his left sleeve that says 'Discipline Committee'.

Kiyomi couldn't help but noticed that everyone around her was staring at him with a terrified look in their eyes; which made her wonder who he is. "The director of the discipline committee, Hibari Kyoya!" She heard Tsuna muttered to himself. 'Hibari Kyoya…' She said his name in her head and for some strange reason, she likes the sound of his name.

"I'm sorry, I'll return him immediately!" Tsuna announced before he grabbed Kiyomi by the arm and dragged her away.

"10th!" Gokudera called out as he followed them.

"Come back before class starts!" Yamamoto shouted.

Everyone in the hallway stared down at the direction Tsuna, Kiyomi, and Gokudera ran while wondering what Kyoya will do. "How long are you going to crowd there?" Kyoya asked in a cold voice. Everyone flinched as he narrowed his eyes at them. "I'll eliminate you."

Tsuna and Kiyomi ended up running outside of the school where the drinking fountain was located. Tsuna placed his hands on his knees as he started to catch his breathe. "I'm sorry…Kiyomi…for dragging…you in on…this…" He said while gasping for air.

Kiyomi smiled at him and said, "It's all right. But Tsuna, do you know this kid?" She looked down at the boy who was clutching her shirt with his hands tightly.

Tsuna stood up straight and asked, "Your name was Lambo, right? What are you doing here?"

"I was…looking for Reborn." The boy, Lambo, said as he was wiping his tears away. "Reborn?" Kiyomi asked.

Gokudera came running towards them and asked, "10th, who is this kid? It seems he knows Reborn."

Tsuna looked at Gokudera. "Uh yeah, they're acquaintances…or something."

Suddenly, the faucets of the drinking fountain split opened to reveal Reborn sitting in a red chair. "Tsuna, classes are starting soon! Hurry up and get back to class."

"Where the hell are you coming out from?!" Tsuna exclaimed as he stared wide eye at Reborn's entrance.

"My hideouts in this school are all connected by a secret passageway."

"Don't just randomly do that!"

Suddenly, Lambo pulled himself out of Kiyomi's arms and climbed on top of her head. He started laughing and shouted, "You fell for it, Reborn! Everything up until now was staged to get you to come out!"

"But…you had real tears coming out of your eyes." Kiyomi stated. But Lambo didn't listen to her and jumped off of her head; landing on the ground on his feet. "Brace yourself, Reborn!" He shouted before he pulled out a green missile gun out of nowhere and pointed it at Reborn's direction…with Kiyomi in front of him?!

Gokudera turned towards Reborn and asked, "Reborn-san, could this kid be…"

"He's a hitman from the Bovino family." That was all he needed to hear for him to stand in front of Kiyomi and Tsuna with four dynamite sticks in both of his hands. "Stay back, 10th. I'll handle this!"

"No way, Gokudera! Hitman or not, he's just a little kid!" Kiyomi shouted while trying to hold him back. But that didn't stop him from lighting his dynamites. "This is your end!" He shouted before throwing them at Lambo.

The dynamites exploded at Lambo, which knocked him on the ground and destroyed his gun in the process. Lambo started to slowly get up until he fell on his bottom and started to cry. Kiyomi sighed and said, "Good job, Gokudera. You made him cry."

"He's…so weak."

Suddenly, Lambo started digging inside his hair and pulled out a purple bazooka from his hair; surprising Kiyomi, Tsuna, and Gokudera in the process.

"How did he get that out?" Tsuna wondered.

Lambo threw himself inside the bazooka before it shoots him; filling the area around the bazooka with a big pink dust cloud. As the dust cloud started to clear up, Kiyomi could see a tall person walking towards them. The dust cloud disappeared to reveal a handsome boy who looked about her age. He had short black hair and a pair of green eyes though one of closed. He was wearing a black long-sleeved button up shirt with a cow print shirt underneath, a pair of khakis, and a pair of sandals.

The handsome boy sighed before he said, "Ah, geez." When he landed his gaze on Kiyomi, his eyes widen before he rushed towards her and hugs her, surprising her in the process. "Kiyomi-chan! Thanks for taking care of my younger self. I almost forgot how cute you looked." He said while rubbing his cheek on top of her head.

"You pervert!" Gokudera shouted, but he was ignored.

Without letting Kiyomi go, the boy looked at Tsuna and said, "Nice to see you again, young Vongola 10th."

Taking a brief moment to calm down, Gokudera couldn't help but noticed something very familiar about the boy. "I've seen him somewhere…"

Kiyomi looked up at the boy and asked, "Um…Who are you?"

The boy looked down at her and said, "This is Lambo, who was once a crybaby." That statement took Kiyomi and Tsuna by surprise. "WHAT?!"

"I see, the 10 Year Bazooka." Reborn said. Tsuna turned towards Reborn and asked, "What's the 10 Year Bazooka?"

"It's a well-used weapon in the Bovino family." Reborn said.

"A person hit with the 10 Year Bazooka will be replaced with themselves from 10 years in the future. But it only lasts for 5 minutes." Lambo explained.

"No way, this cool guy is Lambo?" Tsuna thought out loud.

Suddenly, Lambo sees Reborn behind Tsuna and released Kiyomi from his arms. As he walked towards Reborn, he said, "Yo, it seems you didn't recognize me, Reborn. It's me Lambo, whom you've always been ignoring." But Reborn ignores him while petting Leon.

'He's still ignoring him…' Kiyomi thought with a sweat drop on the side of her face.

Lambo's hair covered his eyes as he said, "Well, it seems that this is going to come down to a power battle. I'll show you how much I've changed in 10 years."

Suddenly, he pulled out his cow horns and placed them on his head. "Thunder Set!" Lightening came out of nowhere and shocked Lambo, but he appeared to be just fine and his horns started to glow with electricity appearing in his head. "My horns have a million volts."

Kiyomi's eyes widen from what just happened. "Incredible…" She muttered to herself.

"No way!" Tsuna shouted.

"Die Reborn!" Lambo shouted as he ran towards Reborn. "Elettrico Cornuta!" But before he could even land a hit on him, Reborn immediately stops his attack by hitting his head with Leon transformed as a mere cane.

A brief moment of silence filled the area until Lambo said, "Gotta…stay…calm." But Lambo runs away crying.

Tsuna stared at the runaway Lambo with a sweat drop on the back of his head. "He hasn't changed at all in 10 years."

"Just his personality hasn't change." Kiyomi added.

It was now the school's lunch break and Tsuna was on the rooftop with Kiyomi, Gokudera, and Yamamoto. They've decided to eat their lunch there since people hardly ever come up on the roof. Their circle went from left to right: Yamamoto, Tsuna, Gokudera, and Kiyomi.

Tsuna sighed to himself as he started to open his bento. "Geez, this morning was a disaster. I got to class late and was scolded…"

"Even though it was just helping a lost kid." Yamamoto said after he opened his lunch.

"Why are you even here, baseball-man?" Gokudera demanded with a glare on his face.

Yamamoto turned towards him and said, "There's nothing wrong with that. Eating lunch under a clear blue sky is best."

"Yeah, that's true." Tsuna agreed.

"Besides, Kiyomi is here with us." Gokudera glared harder at Yamamoto and said, "She's different! She proved herself to even be near 10th and me."

Kiyomi looked at Gokudera with her chopsticks in her mouth. "Don't you think that's going a little too far, Gokudera?"

Just as Gokudera was about to answer her question, Tsuna made a screeching noise that caused everyone around him to look at him. Coming out of his lunch was a strange purple smoke which killed a few birds that just flew into the smoke and fell around Tsuna, surprising everyone.

"Geez, Tsuna, what kind of lunch did you bring?" Kiyomi asked as she stared at his lunch with wide eyes. Everyone looked at Tsuna's lunch to see that everyone was purple and had poisonous insects in the purple rice.

"T-This is…" Kiyomi couldn't help but notice the look on Gokudera's face when he saw Tsuna's lunch. Judging by his face expression, she could tell that he recognize that kind of food. "It's better if you don't eat that." Everyone looked up to see Reborn staring down at Tsuna's lunch as well. "You'll go straight to heaven with one bite."

"Reborn!" Tsuna called out as Reborn turned his attention to the door that was behind Kiyomi. "Come out. I know you're there Bianchi." Everyone turned towards the door as it opens itself to reveal a beautiful woman who appeared to be a few years older than Kiyomi and her friends.

"Ah, the girl from this morning!" Tsuna shouted.

"Big sis…" Gokudera muttered before his face showed that he was in pain while holding his stomach. "Sis…sister?!" Tsuna was surprised at what he just learned.

'And I thought I was the only one with a cool looking sister…' Kiyomi thought to herself.

"It's been a while, Hayato." Bianchi said as she walked up towards the group. Once she made her destination, she looked up at Reborn.

"Ciaossu, Bianchi." He greeted.

Kiyomi couldn't help but notice Bianchi's cheeks were turning slightly red. "Reborn!" She started to play with a piece of hair with her fingers as she said, "I've come to take you back Reborn. Let's do some large-scale jobs again. The place where you belong is in the dangerous and thrilling underworld."

"I told you before Bianchi, I have the job of raising Tsuna." Reborn explained.

Bianchi turned towards Tsuna as her voice sounded like she was about to cry. "Poor Reborn! That means that if the 10th doesn't die in some horrible accident, Reborn will never be free!"

"What?!" Tsuna screamed as Bianchi turned around and walked away. "I'll wait for it. I'll kill the ten-" Bianchi looked over her shoulder and continued, "I mean, if the 10th dies, I'll come to bring you back." With that said, Bianchi turned back around and walked through the door she came in from.

"Gokudera's sister sure is pretty." Yamamoto stated.

"She is, but…" Tsuna and Yamamoto turned towards Kiyomi who was kneeling by Gokudera who was groaning in pain. "I can't shake the feeling that she's the type of person who won't stop at nothing to get what she wants." Kiyomi helped Gokudera up with his arm around her shoulders while holding him up. "But, for now, I think we need to get Gokudera to the nurse's office. He doesn't look so good."

"Hm, it looks like the nurse isn't here." Yamamoto stated as he helped Kiyomi put Gokudera to bed in the nurse's office. "I'll go look for one."

"Yeah, please." Tsuna agreed as Kiyomi pulled the blanket up to Gokudera's shoulders. Yamamoto left the room before Tsuna asked, "Reborn, what's all this about Gokudera-kun's sister, and what's with the food?"

"She's called Poison Scorpion Bianchi, she's a free hitman. Her special skill is Poison Cooking, where she creates food filled with poison." Reborn explains. "Another weirdo showed up!" Tsuna exclaimed while holding his head.

"Well, what did you think was going to happen, Tsuna?" Kiyomi asked as she walked over to the sink and turned on the faucet. He turned towards her, "Huh?"

"You are going to be 10th Generation Boss of the Vongola family; eventually there will be people like Bianchi who will come after you." Kiyomi explained while getting the compress wet before turning the faucet off.

"Bianchi is also my lover." Reborn said out of nowhere.

Kiyomi turned towards him and said, "Well, that totally explains everything from what I just saw. Good job scoring a pretty girl, Reborn."

"Thank you."

"Do you two even know what you're saying?!" Tsuna shouted.

"Please forgive me, 10th…" Everyone looked at the direction of the voice to see Gokudera, who was awake but still a bit weak.

"Are you all right, Gokudera-kun?" Tsuna asked

Gokudera closed his eyes and said, "I've showed you something so shameful. When I see my sister's face…"

"What is it?" Tsuna asked as he and Kiyomi listened.

"It was when I turned six…We held many lavish parties in our castle…" Gokudera started off. "Castle?! Gokudera-kun is really super-rich?" Tsuna asked, but he was shushed by Kiyomi.

"Tsuna, don't interrupt." She said, leaving Tsuna with a sweat drop on the side of his head.

"I was supposed to have a piano recital in front of everyone and that was when my sister first baked cookies for me. I later realized that my sister had the ability to make anything she cooked into Poison Cooking." Gokudera continued.

"What the heck?!" Tsuna shouted.

"Of course, the performance was a total wreck. But the thing is…everyone loved it. They say it was wonderful and modern." That caused Kiyomi to have a sweat drop on the side of her head. "How bizarre…" She muttered to herself.

"My father was very pleased and increased the number of my recitals. At every piano recital from then on I had to eat my sister's cookies. That fear somehow branded itself onto me and now, whenever I see my sister I get a stomachache." Gokudera finished his story.

"The horror!" Tsuna shouted.

After Kiyomi wringed out the extra water from the compress, she walked towards Gokudera and placed it on his forehead. "That's got to be one rough childhood, Gokudera. I'm just surprised that you didn't actual die from your sister's cooking." She said, causing Gokudera to chuckle.

"Of course, after all, I am the 10th's right-hand man. Which means that I can handle anything."

After making sure that Gokudera would be all right by himself in the nurse's office, Kiyomi decided to go back to her class. She was really looking forward to it because today all of the first year girls were going to be in the cooking class to bake any kind of cake they want. While the girls in Kiyomi's class were baking, most of the girls couldn't help but stare at Kiyomi as she was baking. They were really amazed by how she was baking her devil's food cake all by herself due to the odd number of girls in the class.

Once Kiyomi placed her cake battered pan into the oven, almost immediately all of the girls asked for her help with their cake. But before she could say anything, she noticed Bianchi was running past the opened door of the cooking class with something in her hands. From the direction that Bianchi was running towards, Kiyomi could tell right away that she was making her way towards Tsuna's class.

"Hey, Kiyomi, what's the matter?" One of the girls asked, snapping Kiyomi out of her trance and turned her attention back to the girls. "Oh, it's nothing." She replied with a smile.

"There's something I need to do first. Can one of you girls please take out my cake when it's done?" Kiyomi ran out of the room before she could hear the reply.

As Kiyomi was making her way towards Tsuna's class, she couldn't help but wonder what the object that was in Bianchi's hands was. 'Could it be another Poison Cooking to kill Tsuna?' She asked herself. Once she made it to her destination, she stood by the opened door to see Tsuna in his underwear with all of the boys in his class glaring at him. "I-I ate them…all?" He wondered.

'He must have gotten hit with one of Reborn's bullets again…' Kiyomi thought to herself until she heard a familiar voice from her left, "Gotta…be…calm…I can't!" Suddenly, a loud boom filled the hallway. She turned her head to the side to see Adult Lambo surrounded by pink smoke again. "Lambo!" She called out which caught his attention.

He surprised her by rushing towards her and hugging her. "Kiyomi-chan!"

Before Kiyomi could say anything, she heard footsteps coming towards them. "If it comes to this…" Adult Lambo and Kiyomi looked to the left to see Bianchi running towards them with a huge cake in her hands. "I'm feeding you my special cake!"

Just as Bianchi was about to give her cake to Tsuna, she noticed Kiyomi and Adult Lambo standing by the door. Kiyomi couldn't help but notice the look on Bianchi's face as she was staring at Adult Lambo. "That look on her face…" Kiyomi could tell right away that her face was blushing the same way when she saw Reborn.

"You're…Romeo! You're Romeo!" Bianchi exclaimed.

"Who's Romeo?" Kiyomi asked.

"That's right," Kiyomi looked down by her feet to see Reborn holding a picture. "that idiot looked a lot like Bianchi's ex-boyfriend." He explained.

"Reborn, since when were you there…?" Tsuna exclaimed. But that question was ignored when Reborn showed Kiyomi and Tsuna the picture which revealed Bianchi leaning against a guy, who Kiyomi assumed is Romeo, who looked identical to the man holding her right now. "They're exactly the same!" Tsuna shouted.

"But, Reborn, why do you have this picture?" Kiyomi asked. But before her question could be answered, she heard Bianchi said, "Oh Romeo, you were still alive. Take this! Poison Cooking!" Suddenly, Kiyomi let out a surprise yell when she was pulled away from Adult Lambo to see Bianchi shoving her special cake in his face which caused him to fall on the floor on his back.

"What…the hell?" Kiyomi muttered with wide eyes at the scene.

"It seems the reason Bianchi and her ex-boyfriend broke up was because of an argument." Reborn explained.

A sweat drop appeared on the side of Kiyomi's head. "I…see. Well, in any case, thanks for the save, Reborn. Now then, if you'll excuse me, I have a cake that should be out of the oven by now. Tell Adult Lambo that I hope he feels better." Kiyomi said as she walked out of the room and made her way back to the cooking class.

"I'm home!" Kiyomi announced as she entered her house and took off her shoes. Saiyuri came by the door and said with a smile, "Welcome home, sweetie." She looked down at a white box that was in Kiyomi's hand and asked, "Speaking of sweet, did you pick something up on your way home?"

Kiyomi giggled as she held up the box and said, "Not really. My class had home economics today and made some cakes. I thought that maybe I'd bring it home and share with you guys."

"Really? How wonderful. I've been craving for something sweet all day. Why don't we have a piece and we'll save the rest for your father and your siblings when they come by for a visit this week?" Saiyuri suggested.

"Okay."

And just as she said, Kiyomi cut her cake into six pieces. She placed one piece of cake on three plates while placing the remaining three in the refrigerator for her father and her siblings to try later. Kiyomi, Hatsuharu, and Saiyuri sat at the table with their piece of cake in front of them.

"Well then, shall we give these a try?" Kiyomi and Hatsuharu nodded their heads in agreement and took a bite of their cake.

Kiyomi hummed in delight as she said, "It's delicious." Her brother nodded his head and said, "It's the best I've ever tasted."

"Kiyomi, you have done an excellent job of baking your first cake." Saiyuri said with a smile.

"Well, I did learn from the best, mom."

"Surely, you're not talking about your father, are you?" Saiyuri asked.

"Maybe." Kiyomi answered before everyone in the table started to laugh at her joke.