Summary: Tsunayoshi Sawada, older twin of Tamaki Sawada. Twins who were forced to separate at age two. One whisked away to Italy, where he was raised as the next boss of the Vongola Famiglia. The other left in Japan to live a life as an ordinary citizen. When the official heir returns to his homeland with a baby hitman as his tutor, they thought they knew what to expect. They were wrong.

DISCLAIMER: I do not own anything from Kateikyoushi Hitman Reborn. This fanfic is purely for amusement, and not profit.
WARNINGS: FemTsuna Story.

"Man, it feels so good to be back in Japan," a tall fourteen years old teenager commented as he gazed at his surroundings admirably.

A high voice commented, "Let's go Baka-Tama. Didn't you want to see your family first?"

The teen nodded excitedly, "Let's go!"

The baby smirked, "Since you have so much energy, you're going to run all the way there."

"But what about my—"

"Don't worry about it." The baby ordered. He cocked his rifle and pointed it at the boy. "You have three seconds to start running, before I shoot you."

"Hold on Reborn," The teen tried to reason. "The area is foreign to me, so it's probably not—"

"Did you study the maps?"

"Yeah, but—"

"Did you read the guidebook?"

"You had a gun to my head."

"I'm taking that as a yes. My point is: run or get shot, your choice. Personally, I don't think any mother would like to see her darling boy in his boxers after twelve years since she last saw him."

Seeing him still standing, the hit man fired a warning shot, narrowly missing his left foot. The teen left before Reborn could do it again.

A woman with short brown hair was sweeping the front of her house, when a baby dressed in a suit walked up to her.

"Ciaossu," The baby tipped his fedora in greeting. Despite already knowing the answer, he asked. "Are you Nana Sawada?"

The woman crouched down and smiled. "I am. Who might you be, little boy? Are you lost?"

"My name's Reborn. I'm a hitman and a tutor for your son, Tamaki."

The woman blinked in surprise. "Would you like to come in? I knew Tamaki was coming back today, but I didn't know he would be bringing a friend."

"Thank you, Mrs. Sawada."

Nana giggled. "Please call me Mama."

As Nana set about making lunch, Reborn sipped the coffee that he bought at the airport. It was decent, but he would have still preferred something else. He watched as Nana moved around in her kitchen with the ease of an expert. It seemed like Iemitsu was right. His wife was a beautiful and kind woman with a heart that was nothing like those in the mafia. Despite meeting her only a few minutes ago, he could see why Iemitsu tried to keep her in the dark. Still, Reborn frowned unnoticeably, it wasn't right to hide things from her. Especially, since her son was going to join that world.

His thoughts broke away from Iemitsu, when Nana set a plate down in front of him. Looking at the omelette, Reborn could tell it would taste as wonderful as it appeared.

"Thank you Mama." Reborn said before he took a bite.

Nana smiled as she took a seat in front of him. She placed her elbows on the table, interlocked her fingers, and rested her chin on them, before cocking her head to the side. "I'm happy to have someone as cute as you eat my food."

"It's delicious," he commented.

"Thank you, but I'm confused. How can someone as young as you arrive here before Tamaki? Shouldn't he be with you?"

"I'm not as young as I look," Reborn said, "I told Tamaki to go on a run to get used to Japan. I'm here ahead of him to acquaint myself with his family. Iemitsu told me a lot, but I like to see things with my own eyes."

"I see," Nana murmured. As he chewed, Reborn caught the look in her eyes, before it disappeared. She was hurt, but it was a pain that was so old that she could ignore it for now.

Reborn said. "Are you surprised?"

"No," Nana said a little too quickly.

"He loves his family."

Nana blinked a few times as though something was in her eyes or she was trying not to cry.

"Well, he has a pretty strange way of showing it." Nana said softly almost to herself, "Though that's probably part of what I love about him. He always was one of a kind. Just like how I'm one of those wives who wait for their husbands to come back home from their adventures, accepting whatever he says and brings. He was always proud of my trust in him."

"Mama," Reborn said, slightly regretting bringing up Iemitsu. Perhaps, Nana wasn't as oblivious as Iemitsu believed. "Would you like to hear about Tamaki?"

"Yes," Nana smiled sadly. "But I would prefer to hear it from him, Reborn. Would you like to hear about Tsuna?"

"Tsunayoshi," Reborn nodded thoughtfully. Iemitsu had said little about him. Only that he was a cute, obedient, and quiet little boy. The boy that was more likely to read than play sports. His father said he was completely incompatible with the mafia.

"Well, she's my sweet baby girl." Nana said fondly.

Reborn froze, "She?"

Puzzled, Nana looked at Reborn. "Tsunayoshi is Tamaki's older twin sister. Iemitsu must have told you that when he talked about our family."

As Nana rattled on about her daughter, half of Reborn's mind was listening and storing the information, while the other half was going over everything Ietmitsu said about Tsunayoshi. Nana's small gasp and a cold wetness on his cheek caused him to look down. Leon, his faithful and reassuring partner, was staring back him worriedly. Apparently, Leon had sensed his annoyance and shock. While Nana examined and greeted Leon warmly, Reborn swore to himself that the next time he saw her husband he would bash his head to the ground.

If he knew, then he was lying to him and Nono. That was unforgivable. But if he thought Tsunayoshi was a boy…

What kind of a father mistook his own daughter for a son?

Glancing at the clock, Reborn decided that he had a few hours before either of the Sawada twins came home. Enough time to figure out how this new knowledge could impact his plans, and think of ways to make Iemitsu pay.

The doorbell interrupted Nana as she was retelling a time when Tsuna first bought the groceries by herself. Inwardly, Reborn was relieved by the distraction. Over two hours, and Nana was just talking starting to talk about a Tsunayoshi of age eight.

Nana opened the door, and squealed before wrapping her arms around her baby. She dragged him inside with surprising strength and closed the door with her body. Turning her attention to her son, she squeezed.

"M-mom," Tamaki wheezed, "N-need to breathe."

Loosening her arms by a fraction, Nana beamed at her son with her eyes gleaming brightly.

His face softened, "I'm back, Mom."

Filled with much joy, Nana led her son to the kitchen and told him to sit, while she went to make a meal for him.

Tamaki gazed around his house in amazement. It was vaguely familiar to him, but seeing it with his own eyes had a profound effect. He sighed happily, before looking in front of him. He gave a short scream and fell off his seat, causing Nana to rush out of the kitchen with a soup ladle raised like a mallet.

"Baka-Tama," Reborn snorted. Turning to Nana, he said. "He just slipped from his seat, mama. Tamaki's fine."

Relieved, Nana quickly returned to her pot of stew.

"Reborn!" Tamaki shouted, "How did you get here?"

"I had a ride." The hitman said bluntly. "Listen Baka-Tama, there's something you need to know. Your twin—"

"I'm home!"

A petite adolescent with long brunette hair tied into a braid, entered the kitchen doorway. Reborn gaped at her, instantly recognizing the similarities between her and Primo. He also noticed that she wore a baggy Namimori male's uniform that obscured her physique. She was cute, but it wasn't a complete feminine form of cuteness. Despite her girlish features, she could have been mistaken as a boy. Her gender was not obvious, but it was clear that she inherited more from Nana than Iemitsu, unlike her twin.

The girl looked at them coolly. "Hello."

Tamaki snapped out of his shock, and lunged forward, "Tsuna!"

The girl stared at him blankly. There was an awkward moment as the two just stared at each other. Slowly, a grin spread across Tsuna's face.

"Tamaki," Tsuna said. She walked over to her brother and gave him a hug. Tamaki was thrown off-guard, but quickly wrapped his arms around his twin. Almost immediately, Tamaki noticed their height difference and Tsuna's small build.

Reborn looked over the twins, noticing that Nana was watching her children with shinning eyes. She quietly went back to the kitchen, leaving with his unfinished omelet. He looked back at the children. At the moment, Tamaki looked like the older twin instead of the younger on. If he didn't know any better, hey could be twin brothers, instead of brother and sister.

Tsuna's eyes glanced at Reborn, curiosity clearly in her eyes. She pulled away from her brother and asked, "Who is the baby? Did you do something you need to tell mom and me about?"

Reborn aimed a kick at her, but she moved out of reach before he struck. Not bad.

"I'm Reborn, the world's greatest hit man and Tamaki's tutor." He said.

Reborn waited for the one of the usual reactions: spluttering, drop jaw, condescending laughter, disbelief snort, or an amused quirk of the lips that clearly showed their doubt of his job description. Any normal civilian, especially a teenager, would dismiss him as an imaginative baby.

"How interesting," Tsuna said thoughtfully. She asked nonchalantly, "How much do you charge for a hit?"

Reborn said seriously, "It depends on the client and the target."

Tsuna gave that small smile, before crouching down to meet his eyes. She simply stared at him. Finally, she said softly, "You're not yourself at the moment are you?"

Turning her head to her twin, before Reborn could form a response, she said. "I'm going upstairs to change. Why don't you follow me up, so I can show you your room?"

Tamaki agreed, although he was unsettled by the thought that his brother believed Reborn. Wasn't Tsuna supposed to be the normal one?

Reborn hopped onto Tsuna's head, enjoying the softness of her hair. "I'll come with you."

Tsuna raised her eyes upward, "Are you sure? Don't you want to try some of mom's cookies?"

"Later," Reborn pulled on tapped his foot against her head. "Start moving."

Tsuna frowned. "You shouldn't touch someone's head with your foot."

Reborn ignored her and observed the house as she moved. He didn't miss the expression on his student's face, but it was of low importance. His main objective was to see what else the CEDEF leader had misled.

On the walls were pictures of a younger Nana and child with short brunette hair. Strangely, the child was never shown to have her hair down. It was always short, braided, or put in a ponytail. The child also wore big glasses that seemed to emphasize her small face, and dimmed the effect of her eyes.

"I still have a pair of glasses," Tsuna said as she went passed a door. "But I usually wear contacts, since they're less likely to break."

"I never wore glasses," Tamaki commented tactlessly as he tried to look at everything at the same time.

Tsuna's face didn't change, but Reborn thought he saw a glimpse of something behind her eyes that raised the hair on the back of his neck.

Tsuna stopped outside a door and turned the doorknob, revealing a standard neat and clean room, "This is your room. You can decorate it however you like, but Mom doesn't clean our rooms now that we're in middle school. It's our responsibility. Well? What are you waiting for, go in."

Tsuna leaned back against the doorframe as Tamaki hurriedly went into his room. Finally, Tsuna stated, "You're disappointed."

"I'm not!" protested Tamaki, but the lack of excitement in his eyes revealed his true feelings. "It's great! The room—"

"Is probably less than what you had wherever the hell father took you when we were two," finished Tsuna.

Reborn's attentiveness was riled by this point. Tsuna had very good intuition or was skilled in reading people; possibly even both. Vongola Primo's blood did run in her veins, afterall. His student was skilled enough to deceive an average civilian, so his sister, who had no need to look past deception of his level, should have been fooled. Yet, Tsuna wasn't.

Plus, she referred to the CEDEF as father, while calling Nana mom. Perhaps, she would reveal her feelings towards her father to Tamaki….

And he wasn't a cursed hit man, but a real baby.

Seeing Tamaki's hesitation, Tsuna's eyes soften. "Just tell me the truth, little brother."

"Back…there, I had…all sorts of things." Tamaki said carefully. "It's great, but I thought that things would be different, since you and mom received checks from dad."

Tsuna was calm, but something on her face caused Tamaki to wince. She opened her mouth, but a ring tone came out of her bag. She pulled out an orange phone, placed it against her ear, and simply put it back into her bag after she was done.

"Tamaki," Her brother straightened, as she spoke. "I need to go out soon, so as I change I want you to ask mom about the sushi bar owned by the Yamamotos."

Reborn didn't protest as small hands grabbed his waist and lifted him off his soft seat. Tsuna placed him on the ground, nodded once in farewell, and then walked to her room.

Reborn looked at his student. "What are you waiting for baka-Tama? Go do what your twin said."

As Nana was setting the table, she noticed Tamaki and Reborn hovering near the door way. She flashed them a big smile as she tiled her head in puzzlement. Excitement still lingered within her at the sight of her son. Twelve years of only photographs and telephone conversations couldn't even compare to this.

"Mom," Tamaki started unsurely, "Tsuna told me to ask you about a sushi bar."

Reborn added as he jumped on a chair, "Owned by the Yamamotos."

Nana stopped smiling, alarming Tamaki and Reborn. She set herself down on a chair and gestured wordlessly for Tamaki to sit next to her.

"About ten years ago," Nana started, "when Tsunayoshi was four years old, our family experienced a…financial disaster."

"I still have no idea how, but someone took all our money. Everything from the bank account in my name, the house, and even from my purse," Nana grimaced. "The account I shared with your father was frozen for some reason, so Tsuna and I were forced to leave this house. It took us two months, before we found a place to stay. We lived with a nice family called the Sasagawas. Mrs. Sasagawa and I were high school friends. She couldn't in good conscience ignore the predicament that I and Tsuna were in. She said, 'I knew you and you certainly haven't change. My daughter likes your daughter. You are not going to sleep in the park or the streets when I have room in my house for you two. I want to help, so you will let me help you."

"What about the money Dad was sending you?"

"During that time, your father's checks weren't arriving. We had to live off the generosity of others, which wasn't pleasant for Tsuna and me."

Reborn frowned as he recalled the time frame. That was when Ietmitsu went undercover to gather information about a rival famiglia. Only the ninth and the CEDEF had contact with him.

"I had to find a job," Nana shrugged, "But I was often rejected for my less than stellar resume. As I was looking for a job, I came across a certain sushi bar. Imagine my surprise, when I saw Tsuna playing with another child inside that restaurant. Tsuna was always a shy, so it was surprising."

"Well, I met Yamamoto-san, the owner of the establishment. To put it simply, we became fast friends and agreed to let the kids play with each other. So, if Tsuna wasn't with the Sasasgawa children, then she was with the Yamamotos. One way or another, Yamamoto-san heard about the predicament Tsuna and I were in, and he gave me a job helping him at the restaurant. After another six months passed, your father's checks came back, and Tsuna and I moved back in."

"Tama-kun, Tsuna and I learned a lot from this ordeal. Right after we settled back in, I knew that your father's checks weren't enough to make up for what Tsuna and I went through. His absence certainly didn't help matters. " Nana said seriously, making Tamaki straighten himself. "Tsuna and I owe the Sasasgawas and Yamamotos. They are good people and friends. Even now, they won't accept any money or gifts from Tsuna and me for lending us a roof to sleep under, food, and companionship."

"Then where does the money go?" Tamaki questioned.

"Tsuna's education, bills, a back-up emergency bank account that is overseen by a family member of a trusted friend, groceries, emergencies, and other things like that. Tsuna and I were spoiled by the money that your father gave us, so we've learned to take better care of what we have. Why get all the brand new, expensive, and top-notched products, when we can get the same results with something else? We don't need to live like royalty or high-class people. Tsuna and I are happy."

With that, Nana stood up and smiled brightly, "Is there anything you want to eat for dinner, specifically?"

"Anything you make will taste delicious, Mama." Reborn said in place of his student. "We'll leave it up to your capable hands."

Nana giggled, before going into the kitchen, her mind no doubt going over meals that suited the occasion.

After making sure his mother couldn't hear, Tamaki gestured for Reborn to come closer, frowning.

"Reborn," Tamaki said in what he thought was a quiet voice. "I think someone's betraying dad."

"Baka-Tama," Reborn didn't bother hiding his disbelief.

Tamaki frowned harder. "Come on, Dad wouldn't have stopped giving the checks. I'm sure he told someone and they didn't send it to mom and Tsuna."

Reborn looked at his student straight in the eyes and said, "Your father is a human. He could make mistakes," Big and idiotic mistakes. "You can't ignore the fact that someone you admire has flaws."

"I know dad has flaws," Tamaki protested, "But he's a busy man, so it's understandable for him to—"

"Mom," Tsuna's clear voice cut through the air. Tamaki's head whipped around and to his immense relief, it appeared that his twin didn't hear. To Reborn's trained eyes, however, he could tell that Tsuna was too calm. Her entrance was too much of a coincidence to be true. Tsuna wore baggy jeans and an orange sweatshirt with the number twenty-seven on the front above the pocket. She carried a black duffle bag over her shoulder. Ignoring the guests, she called out. "Mom, I got called out by the Committee, so I might be late for dinner."

"Okay, Tsu-chan~ but can you please try to get home on time?"

Tsuna agreed, nodded at Reborn and Tamaki, before leaving the house. Reborn narrowed his eyes. "Baka-Tama, I'll let you off easy tonight. You can go unpack"

Unwilling to question an unexpected gift, Tamaki quickly went upstairs before Reborn could change his mind. Reborn wrote a note to mama and placed it on the table.

Tsuna felt eyes following her, but she kept walking to the park. She sat down on one of the swings and waited.

Reborn perched himself on a nearby tree branch, obscured from the eyes of others because of the leaves. He and Leon watched the eldest daughter of his friend's friend. What was she doing out here?

A tall teenage had arrived.

Reborn's hitman senses were alerted. This boy walked with an intense air around him, similar to killing intent but inactive. Most people would be frightened of this boy, but the quiet and calm daughter of Nana Sawada made a small smile at him, a genuine smile that wasn't like the ones she gave to Tamaki and him.

Reborn felt his breath hitched. With that one action, there was nothing that could deny Tsunayoshi Sawada's true form.

She was definitely a girl.

Tsuna was still smiling as she said. "Hello, Senpai."