prompt: "I have a crush on my younger sibling's tutor, but I don't know how to work myself into the scene without making everything incredibly awkward for me" au

Summary: It all started when Lammy needed a Physical Ed tutor.

a/n: i didn't proofread this. also, this fic will contain five chapters. :) [cross posted in ao3]

Chapter 1: Warm-Up Drill

It all started when Lammy needed a Physical Ed tutor, and Cora-san decided to contact a family friend who can help his sister.

"So you're telling me that Cora-san is going to pay an amateur to teach you how to play Volleyball?" Law asked his sister, unimpressed while leafing a blue hard-bound book he brought from his University's Library.

The older Trafalgar sibling just got home two days ago for his summer break, but he's only hearing this news now.

Lammy furrowed her eyebrows and gave her big brother a stink eye.

"Well, do you know how to play Volleyball?" Lammy countered.

"That's not the point," Law said, rolling his eyes. "Why do you even want someone to teach you how to play Volleyball? Isn't that sports already being taught in your school?"

Lammy sighed before throwing herself on the sofa beside her big brother.

"It is! But you know that generally, I'm not that good in sports-"

"We're both not good in sports." Law sassed.

Lammy glared at him for interupting her, "-because of my stamina and endurance problem, so I need someone to at least coach me. You, on the other hand, don't care about it because you suck at it."

Law stretched his tanned tattooed arm on the back of the sofa as Lammy burrowed at the side of her big brother.

"Besides, according to Uncle Roci, the person he will hire to tutor me competed in National Competition since he was young." Lammy added as she looked up at Law.

"National Competition? Hmm, well, we'll see." Law murmured as his golden eyes glanced at his brunette sister, but at the triumphant smile on his little sister's face, Law knew Lammy heard him.

And the older Trafalgar sibling suddenly felt a looming dread in his guts. He didn't know what it is yet, but he's certain that he'll probably blame his beloved sister and their adopted guardian...

A week later, at the persistent pleading of Cora-san and Lammy, instead of enjoying his summer break in peace, Law awkwardly found himself seated on the brown sofa in the cozy living room of the Monkey Family's residence and getting served with green tea and rice crackers by a beautiful woman with freckles and long strawberry blonde hair.

"If you need more tea and rice crackers, I'm in the kitchen, Garp." Rouge said, glaring at the grey-haired old man in red hawaiian shirt, who's only grinning- seemingly oblivious to the ire of the woman.

Then, she warmly smiled at the three guests, especially at Lammy who received a plate of mochi ice cream from the woman before she left them in favour of going back to cooking in the kitchen.

"I'm sorry for imposing on your rare day off, Garp-san." Cora-san apologised while picking up one of the four brown cups of green tea on the coffee table.

Without checking if the hot beverage is drinkable and won't burn him, Cora-san took a generous sip and promptly spluttered.

"Uncle Roci!" Lammy gasped, a bit embarrassed at their adopted guardian's usual clumsiness.

She also looked like she's going to scold him, but Law acted quickly and gently shoved a bite-sized piece of mochi ice cream in her mouth.

"Don't worry about it." Garp assured the klutzy blond man, looking amused and used to the man's ditsiness.

The Trafalgar Siblings learned earlier that Monkey D. Garp was working with their adopted Grandfather in the Navy, and he's also the family friend that Cora-san contacted to help Lammy in her problem.

"I was going to send Luffy to you a week ago when he came home from University, but six days ago, he sneaked out and went to this Training Camp." Garp began as Cora-san wiped himself and the coffee table. "His Aunt Dadan is fetching him now with his brothers at the train station."

"Wait, you mean Luffy? Straw Hat Luffy?" Lammy suddenly got excited.

Law raised a brow at that. Since when did his sister got excited when it comes to sport figures?

"Ah! You know him? That's great, then." Garp said before a booming laughter escaped from him.

"Hmm!" Lammy nodded as her twin pig-tails swaying as she bobbed her head and her eyes lit in excitement. "My friends and I watched a few videos of his previous matches online. He's strong and cool!"

And then, Lammy started to gush over the fact that Monkey D. Luffy, apparently known as Straw Hat Luffy because of the Straw Hat he always wore and will never take off during official tournaments, will tutor her in Physical Ed.

All of a sudden, there's a complete silence between the four people in the living room when they heard a car pulling in front of the house and hurried footsteps with three loud voices arguing.

"-not my mother, Sabo!"

"But I'm your brother and you guys are stupid."

"Uh-huh, and who's the idiot who told this other idiot that he will-"

"-decided that we will not talk about-"

Garp calmly got up from his seat and stood in front of the door, his eight feet tall height loomed there, ominously.

"No matter how you look at it-"

"-and who's fault-"

"-you said that it's fine!"

When the door opened, the three arguing stopped dead in their tracks when they saw who's waiting for them.

"Uh-oh..." The three at the doorstep echoed.

"You three dared to sneak out." Garp's booming voice echoed in the house as he greeted his three grandsons with his 'Fist of Love'.

Cora-san dropped the unlit cigarette between his lips at the scene in front of them. Lammy gasped in horror while Law's lips quirked upwards at his amusement.

"Dadan!" Garp angrily called the ginger-haired old woman who appeared behind the three males.

"What is it, Garp-san?" She grumbled as she inhaled smoke from her deathstick.

"You didn't watched over these brats!" Garp exclaimed.

"It's not my job anymore!" Dadan argued as she went toe-to-toe against the Vice-Admiral of the Marines. "And they're already grown up, you stupid old man!"

"Who are you calling stupid?!"

While the two elders childishly argued, the three brothers tried to sneak inside their home by slowly moving, not noticing the two baffled and one entertained guests in their living room. The commotion at the Monkey Family's doorway only stopped when Rouge stepped out of the kitchen.

"Is there a problem here?" She quietly asked while wiping her pale and slender hands with a white towel.

Garp and Dadan immediately stiffened when they heard Rouge. Meanwhile, the three brothers' faces lit up upon seeing their mother.

"We're home, Mother." The eldest, Ace, greeted as he walked over to Rouge to embrace the woman.

"We're home!" The other two echoed to give their mother a hug too.

"Welcome home." Rouge warmly greeted her three sons that surrounded her in their affectionate embrace... and probably, the three brothers' only shield against their grandfather.

Only when the three brothers pulled away from their mother, did they noticed the three guests in their living room.

"Who the hell are they?" Ace quietly grumbled, shooting the guests with suspicious glare.

Law shot him his own glare to match while Lammy pinched at his side to stop him.

"That's not how we treat guests in this house, idiot." Sabo hissed at his older raven-haired brother.

Luffy only tilted his head in wonder, straw hat hanging behind him as he stared at their guests while standing between his brothers.

Cora-san suddenly stood, towering all of them with his height. He silently urged Law and Lammy to stand up too, which his little sister gladly did.

"I'm Rosinante, the guardian of these two." Cora-san grinned sheepishly as he introduced himself.

"Trafalgar Law." Law concisely uttered, remaining unfazed at all of it.

He's just sitting there on the brown sofa, not caring if he's being rude and just wishing that he took more cups of coffee this morning because the amount of caffeine in his system right now, despite drinking a cup of tea, is not enough to deal with all of this.

"My name's Trafalgar Lammy!" Lammy eagerly introduced herself as she stared at Straw Hat Luffy with her wide starry eyes. "And I'm excited to learn from you, Luffy-san."

"Huh? What are you talking about?" Luffy asked the seventeen years old Lammy, his brows were furrowing while lips pouting in his confusion.

(And Law honestly thought that Straw Hat-ya is NOT cute. Nope. Not at all.)

"Ah! I forgot to tell him..." Garp remarked as he started to pick on his nose.

"Garp-san!" Cora-san yelped.

"Oh, well... Luffy, you're going to do what I'm going to tell you."

Luffy, the stubborn mule that he is, immediately refused without hearing what his grandfather is going to say next.

"No way, Gramps!" He exclaimed as he crossed his arms above his chest.

The younger Trafalgar sibling was too shocked to deflate in disappointment at what she heard.

"If you agreed to help me help a family friend, I'll treat you to an all-you-can-eat Barbecue House."

That perked Luffy's interest and he started to drool while his eyes gleamed, "Really?!"

"Ah. You can eat all the meat you want." Garp said while grinning at his youngest grandson.

Luffy quickly wiped the drool at the corner of his mouth and tried to compose himself by breathing deeply.

"Okay, I'll do it." He agreed, eyes closed in deep concentration.

Lammy jumped and squealed in delight because the Straw Hat Luffy will coach her in Physical Ed. Meanwhile, Cora-san and Law dropped their jaws at the great spectacle in front of them.

"So what is it? The thing Luffy will do that earned him a ticket to an all-you-can-eat meat?" Sabo curiously asked as he leaned at the wall separating the living room from the kitchen.

"Tutoring Lammy in Physical Ed, specifically, how to play volleyball." Cora-san was the one who answered the curious inquiry of the other blond in the room.

"Ah, why didn't you say so? Of course, I'll help you." Luffy beamed.

Law had to look away from Straw Hat Luffy's blinding smile. His cheeks and the tips of his ears are tinted with light blush. He hoped no one noticed, but unfortunately, when he glanced around, he saw Cora-san grinning at him, knowingly.

He almost groaned aloud. It's going to be a long summer break...

thank you for reading! favourites, follows and reviews are very much appreciated. :D

~LittlemissLazy