Note: This is all taking place some time before the Ring Battle.
"Hey" Dino says as he shakes her shoulders. "Wake up. You're coming to Japan with me today."
"Why?" the teenager asks.
"You'll be able to meet your brother, Sawada Ysunayoshi, the soon-to-be tenth Vongola boss, and-"
Akari interrupts him by telling him that Tsuna sounds boring and turns over to go back to sleep. The 22 year old complains and tells her to let him finish talking. She lays silently, listening. When he mentions Gokudera-kun and Shamal are there, she immediately sits up.
"Really?!" she exclaims. He nods. "When are we leaving today?!"
"Right now." he announces before he opens the door. They walk into the long hallway and climb up a long flight of stairs to the roof. She realizes she is still wearing her pajamas when she trips over her pajama pants. Dino helps her up and tells her she can change clothes in the helicopter. Surprised at the transportation mode, she asks how long she will stay in Japan. She hopes he will say "You're going to live there" and, as always, she was right. She was happy at first but thought about her belongings at home. Seeing her face and understanding why she suddenly became so sad, Dino comforts her by informing her that all her stuff has been sent to Tsuna's house.
When they reach their destination, Romario is waiting beside the helicopter. She smiles and greets him with a warm "Hello" as he helps his boss and Akari get into the aircraft. Once she enters, she asks Dino, "So what is my brother like?" Smiling, he tells her he is very strong, kind, and has the potential to become the perfect boss. Akari shakes her head questioning "Did he go through training like I did?!" Dino looks at her disapprovingly. "Not as much. You've trained longer than he has."
"Psh, I trained to become a ninja!"
He laughs, "Hahaha, I know. You trained with the scariest. I really didn't want to bring you here because they asked me to, but I didn't want to fight with them." The girl chuckles and claims he is a coward and is then handed her clothes to change into. Looking at Romario like he's crazy for handing the garments to her now, he holds up a large towel to cover her so she can change in privacy.
The ride was peaceful after she changed. She enjoyed the breeze in her face. Sadness came over her when Dino announced they were in front of Tsuna's house.
"Do you seriously expect me to jump off of this helicopter?!" she screams after he jumps down, and tells for to follow.
"Come on, I know you've jumped down from higher places!"
"It's not that, you idiot! I'm a girl and I'm wearing a skirt!"
"No one will care, the street is empty anyways!"
"You are such a pervert!"
"Ah-! Wai- I didn't... Its not like that!" He wails.
"Liar!" She screams at him as Romario boldly pushes her out, knowing he will probably get scolded for doing so. They all panic as she falls, but she's caught by an old friend.
"I figured you would still be doing crazy things even after you got out of the hospital" a familiar voice says in her ear. Akari gets teary and hugs him, sobbing in his shoulder trying to say something. He lifts up her face but looks annoyed at her when he sees the snot on his shirt. Embarrassed, she cries even harder. Yamamoto comes running in saying Gokudera shouldn't have run ahead of him.
"Ah! Just in time Yamamoto!" Dino says as he pats his shoulder. "I want you to meet Tsuna's sister, Sawada Akari."
"I can't see her when she's crying into Gokudera-kun's arms." he complains.
Gokudera lifts her from his shoulder, trying not to move it too much because of how uncomfortable it is moving in wet clothing. He gently wipes her tears, and hands her a tissue. "Must I always see you with such a sad face? The last time I saw you you were in the hospital." Gokudera says softly.
"I'm sorry Hayato-kun... I didn't want to jump off of the helicopter because I was wearing a skirt..."
Yamamoto comes in, telling her she is a very cute girl. Gokudera gets pissed off and scolds him for saying such things to someone he just met. The taller boy argues back and tells him he was just trying to be nice and takes a glance at Akari, who is sitting there wiping her tears and nose, and looks at Gokudera with disappointment in his eyes then asks what he did to make her cry.
"Che! Why do you think I did something to her?! She fell out of the helicopter and I caught her! There's nothing wrong with that! Besides, she just started crying for no reason!" Gokudera retorts.
Akari stands up and hugs Gokudera saying things like "I missed you" or "I'm sorry for scaring you" and "I wont do that anymore." Yamamoto grins and says, "Past lovers, huh?" with a bit of a chuckle. The two glare at him. He looks around innocently and runs inside the house screaming "TSUNA!" Dino laughs and suggests they go inside before a crowd forms. Gokudera and Akari look at him strangely and tell him that a small crowd had already appeared when the helicopter arrived. The young boss scratches his head in embarrassment. "Just go inside." he whispers.
Inside the house, they hear crying coming from the kitchen. Everyone goes inside to see Tsuna's mother, Sawada Nana, sobbing into a red, pie designed towelette. She looks up from the towelette with eyes red from crying. Akari puts on a soothing smile and asks "Why are you crying, mom?" then hugs her. When the hug is finished, Nana answers back with "I thought you were dead..." and more tears roll down her eyes.
The moment was a happy one; A nice family reunion. They haven't seen each other since the day Akari was born. She tells her mother that Iemitsu took her to Italy for her studies the day she was born. Akari asked her mother not to be so mad at her husband when he comes back. "Where is he? Shouldn't he be with you?" Nana asks. Akari shakes her head and replies with a firm No. Lambo comes running in with cake in his hands screaming "NGYAHAHAHAHAHA! THIS CAKE IS LAMBO-SAN'S!" with I-Pin following him, lecturing him about the cake not being his.
Lambo bumps into Akari and the cake goes flying onto Tsuna's face. Gokudera picks up the small child screaming, "Stupid cow!" into his face, making Lambo cry and jump into Akari's arms. She wipes his tears and says "'Sup Lambo." The child hugs her tightly making Gokudera even more mad, saying he shouldn't be hugging Akari like she's his girlfriend. Lambo screams back "AKARI'S MINE STUPIDERA!" and kisses her cheek, making Akari laugh at him saying he's cute and tells him to say sorry to Gokudera. He jumps down from her arms, looks up at Gokudera, and apologizes.
Tsuna is amazed that he now has such a cool older sister and asks for her autograph. She looks at him like he's mental for asking such a stupid question when she should be asking for his autograph because he's the future boss of the Vongola.
She checks the time on her watch and announces that they might be late if anymore time is wasted. Tsuna panics because he is still in his pajamas and needs to wash the cake off, so Reborn kicks him saying he should have been ready before Akari came, while Yamamoto thanks Akari for the heads up and jogs to school. Gokudera tries to decide whether he should wait until Tsuna is ready, or walk to school with Akari. He decides to stay for Tsuna and waves good-bye to Akari as she heads out the door.
At school, their homeroom teacher lets Akari introduce herself. "Hello, my name is Sawada Akari." she says before she bows to the class. Everyone except Tsuna, Gokudera, and Yamamoto laugh at her. A few students make remarks like "So you're related to Loser-Tsuna? That must suck!" and "I never knew he had a sister." She replies with "Yes I am related to him, but I'm nothing like him. In fact, I just met him this morning." Everyone is curious to how these two siblings could have only met this morning. Akari understands the confusion so she explains to them how she grew up in Italy. The teacher asks if she knew any mafia members, and just as she is about to open her mouth to answer, he says "Just kidding!" and tells her to go to her seat.
A few classes later, it was lunch time. Yamamoto asks Akari if she was good at any sports. "A ton of them." she answers.
"Amazing! What about baseball?"
"Of course. To me, It's one of the easiest sports ever!"
"That's just like me!"
They chat for a little while longer, but then she sees Gokudera pass by. She apologizes to Yamamoto before leaving so suddenly to go to Gokudera. She taps on his shoulder and he quickly jumps as he turns around, holding dynamite in his hand. Not many people tap his shoulder on a daily basis so he doesn't know how to just turn and say "How's it going?"
At the sight of Akari, he puts his dynamite away and asks what she wants. She asks what's new with his life and how he's been. He replies with "Tenth has really changed my life for the better! He's strong and so kind!" with a big grin on his face that she hasn't seen in ages. She sadly looks down, getting a sincere "Are you okay?" and shoulder pat from Gokudera. She forces a smile, looks back up at him, and nods. He looks worried asking her if she's well nowadays.
"Of course you silly! Why wouldn't I be?"
"Are you absolutely sure?"
"Yes. Why?"
"Well... That last time I saw you... you... you were in the hospital."
"I'm alright! I'm fine and functioning right!"
"That's good to hear."
"If I weren't alright, I wouldn't be here you know. But... Do you really think Tsuna is right to become the Tenth?"
"How could you even say such a thing?! Of course he is!"
She sadly looks down again, saying, "That's nice," then looks up again, "but my masters would not be glad to hear that." He looks at her with a confused face asking who her masters were. She quickly covers her mouth and says she wasn't supposed to mention anything about them. He gets mad again and asks with a more firm tone, adding "Why wouldn't they like it?! Why can't you talk about them?!"
She bows and says she still can't say anything about them, and also apologizes for the burden she has caused. He ignores her and grabs her arm very angrily, exclaiming "Tell me!" Just as she is about to refuse again, her watch starts to beep. She apologizes once again and runs behind some bushes to answer the video-chat watch.