Just a story to fill up Saki's miniscule pool of fanfiction...
I am not sure I will continue this, but I will give a free reign for anyone to copy the concept... inspired by Kuroko no Basket somehow.
The story is about what if Saki live with Teru and her mother in Tokyo? And instead of Nodoka, Saki is the Intermiddle champion while Nodoka is the runner up. Everything looks so perfect in her mahjong career but both sister has long lost their love for the game... and continue playing because it's part of their life they couldn't discard.

Prologue: Champion sisters

"Tsumo, Rinshan Kaihou... 24000 all..." She said in soft voice yet loud enough for the other three players to hear.

That was the end of the match, so sudden and fast that she was unable to calculate the probability of someone to declare a kan from 8 sou she discarded to get a tenpai or the completing the hand from the dead wall. It was like a bucket of cold water dropped on her head, so quickly that she was so shocked she barely felt the coldness.

"Good game." She murmured in robotic tone followed by other players who lost the game. Her eyes scanned the winning hand with astonishment and realized she had been had, she would never discard that 8 sou if not for honor tile red dragon that discarded before hand. One she took for Shou-San-Gen (Two triplets and one pair of dragons) then again she won't complete it because the 5 pin tile she needed was in that dealer baiman hand.

Haramura Nodoka always believed even in the game that rely much on luck she could always rely in logic but this... there should be three more 5 pin, but of all places all of it was in her hands. What was the chance of her opponent had all of that tile in hand? One in a hundred? Or less? This was the first time Nodoka faced this kind of opponent, she didn't dominate the board and in fact just won six and three of it were cheap hands! But somehow in the last three round Nodoka and other players started dancing to her tune. In fact if she thought of it again she was down to second position because someone else ron her, but it started from discard of this player.

Nodoka was snapped out of her thought by the same gentle voice that announce her lost. "Good game... " Nodoka was no sore loser but for some reason she couldn't accept this, not when the winner looked like the victory worth nothing!

"You doesn't seem to be happy for your victory, Miyanaga-san..." She said coolly, ignoring the other two players who lifelessly left the table.

Miyanaga Saki, representative of West Tokyo for individual match and the two time Inter-middle champion. The girl was the same age as her, with long brown hair that reached pass her shoulder and adorned with a daisy flower pin on the left side.

Her reddish brown eyes narrowed as she smiled at the pink haired girl, but her smile looked sad and pained. "Is that so?" She laughed softly, "It can't be helped... Mahjong has become my life and yet... I can't enjoy it anymore..." She murmured in solemn voice, and for some reason to Nodoka it sounded as if Miyanaga Saki was going to cry that she couldn't enjoy this game anymore. But why?

Nodoka didn't know how long she stood, watching the retreating back of the inter-middle champion. However Nodoka couldn't forget the sad smile that grazed the champion's face. Miyanaga Saki might be the winner today, but for some reason Nodoka thought the champion was the one who grieved the most today. The champion who stood beside her had a smile on her face, one that didn't reach her eyes. She wondered how someone could keep playing but didn't enjoy it, and winning even?

"Haramura-san." Nodoka almost jumped when the MC moved on to interview her after the girl in third place, Nodoka recalled her name was Izumi and her play was nothing special. "This is your first time in National and you manage to get second place! How do you feel?"

Confused and sad, but mostly the later because the girl who defeated her looked unhappier than she was who got second. "While I am pleased to get to second place in my first try in national competition I am determined to do better in the future. I would like to challenge Miyanaga-san again in near future."

The MC looked ready to burst with excitement at her blunt statement, "Do you hear that ladies and gentlemen? Haramura-san declare a challenge to our champiooooon! We can expect another great match next year!" The MC then turned to their champion, "And your answer Miyanaga-san? A champion won't let that kind of challenge lying dooown!"She looked like a child in sugar high but then again not every year a runner up making that kind of blunt challenge.

"I am looking forward to it..." Miyanaga Saki answered with a soft smile, "I would like to have a good match with Haramura-san again next year."

The MC looked very gleeful at the answer though inside she expected a more fiery response, then again what you can expect from the meek girl like this? "OOOH! Did you hear her everyone! Challenge accepted! A promise for another magnificent match next year! In Interhigh!"

Saki frowned inwardly at that, high school... she would go to school together with her sister again. While the prospect of spending time in school with her sister elated her, she couldn't say the same to her mahjong career...

Miyanaga's house

Their mother was in another business trip and won't be back in weeks. This house was as big as one in Nagano but it was not as warm, not with constant absence of parental figure but they 're used to it. Thankfully it was still the same with her sister, they're still very close even though both of them had become somewhat distant with their mother. It was still fresh in their mind, that last family vacation that ended up become a tragedy that rob them a father. Saki was not sure what happened as she was asleep on the way back with Teru, but she was aroused from sleep by arguing voice of their parents. She was still half-asleep when she heard her sister yelled a warning to their parents, especially their father who forgot he was driving.

She couldn't recall the specific of the accident as but she woke up and found herself in hospital with light concussion, Teru was sleeping on bed next to hers with the same condition. The doctor praised Teru for being so brave that in last minute before the collision her sister carried her and jumped out of the car, saving them in the process. Their mother was in ICU but she would recover in few months, but their father didn't make it. Even though his injury is minor in comparison of their mother's broken rib, their father had Carbon Monoxide poisoning when he pulled their mother out of the burning car and when the ambulance came it was too late.

Their mother lived in regret since then, and plunged herself to work. She didn't neglect her children, but supporting two children alone was not easy so Teru and Saki were left to care for themselves most of the time. Saki and Teru tried their best to not burden their mother, busying themselves with their favorite family game and managed to get scholarship in good school with mahjong program. However... at some point they started to be feared by their opponents, and called National class monster. They actually wasn't really concerned of what media or fellow players called them, but since they made their debut in national...

"It's not like you at all to go along with that kind of challenge Saki..." Her sister's voice snapped her out of her musing.

Saki sighed at that, rubbing her wet brown hair with towel as she walked to her sister's direction. Teru was watching a movie adaptation of their favorite novel, apparently it was quite good. "I thought that an answer everyone would expect from a champion... you will say the same thing too Onee-chan."

Teru narrowed her eyes, "But you mean it... not out of courtesy but you're really looking forward to face Haramura Nodoka again. Why? I have seen her game record... it's nothing special... she did a lot of mistake in her play and I am sure you can tell she has zero sense of flow..."

The younger Miyanaga nodded, "I can tell... she probably play online mahjong a lot, and she play logically, accurate, and chose only the most possible route to win..."

"A play style that useless against us... She plays like a robot." Teru stated sternly, plugging the hairdryer and waited for her sister to sit beside her. "You tugged her strings throughout the match, and I wonder if she even notice that..."

Saki shook her head at that as she sat beside Teru, "I think she noticed when she saw my last hand... "

"But still... "Teru trailed off, "Awai is a much better challenge than Haramura Nodoka." At this point Saki had to agree Awai is stronger than Nodoka but... who knows in the near future it would change? "Speaking of that girl, why didn't she participate in individual?"

Saki sweat-dropped at that, "She failed more than half of the last mid term test subject, so she has to attend summer remedial class..." She sighed wearily, "Every time I tried to make her study she ran away, and she interrupted me whenever I mention it..."

Teru paused from drying her sister's silky locks. "... Saki."

"Yes?"

"Tell Awai that... scholarship or not, in Shiraitodai she won't get away unscathed for failing her study..." Teru said. "Sumire will have her head."

Saki sighed at that, it seemed in high school she had to babysit Awai again. She was clumsy enough with her no sense of direction problem, she was not sure if it would help either of them. "If I can finish my sentence before she interrupt me or run away." Saki promised.

"That's good enough for me..." Teru decided, her sister's best friend would be a handful kouhai next spring.

Next Year, Spring

Miyanaga Teru and Miyanaga Saki
The Birth of Double Aces of Shiraitodai

"The article of your sworn rival and her sister." Takei Hisa, the club president said in amused voice. "As expected... she entered Shiraitodai, joining her sister Miyanaga Teru. This year would be especially tough with the two of them in the same team..."

Nodoka narrowed her eyes at the photograph of Miyanaga sisters in their spring uniform. Teru was holding an i-pin tile between her forefinger and middle finger, beside her was the younger sister mirroring the older Miyanaga's pose. Both of them were wearing a charming smile, though in Saki the smile was much softer. "Champion sisters..." The lone male member of their club peered over her shoulders, much to Nodoka's annoyance. "They got five pages of Mahjong Weekly all for themselves! Not even Hayarin-pro on the cover page got that much!"

Mako sighed at that, "As a mahjong club member that's not an amazing thing you should spot from this article, but this..." Mako flipped the page that displayed the sister's game record.

Suga, Nodoka and Yuuki frowned when they saw a cheap hand on the very top of the table then their eyes trailed down and widened in horror. "What the hell?! Her hands was getting more and more expensive! And she only lost in the first hand!"

Mako nodded sagely, "Yep... that's the Inter-high champion, Miyanaga Teru and her consecutive wins... I heard anyone who play against her feel the match is like a survival battle... in team matches especially, and it's rumored she is going to be a Vanguard this year... I won't be surprised if there's a team match decided in the first round because of her."

Nodoka frowned at that, "That's ridiculous... if they think calmly they shouldn't be concerned of Miyanaga Teru-san is going to score bigger hand and forgetting their own.."

Hisa just laughed softly at that, "Maybe... but unless you face it yourself, you can't say..."

"I have faced the younger Miyanaga... she is also a terrifying opponent..." Nodoka murmured softly, "I was reckless and played to her hands... however I am sure to win against either of them is not impossible."

Hisa hummed thoughtfully at that, "Miyanaga Saki... the younger one right? Hum... their play style is somewhat similar in nature..."

"Similar, so she won consecutively too?" Suga flipped the page to see the younger Miyanaga's record, "Eh... Whoa! What kind of game record is this? Base point 2000 become 24000 and some of them are Kazoe Yakuman?! Rinshan Kaihou? Isn't that a very rare yaku?"

Mako sighed, "That's what make both sisters scary... It's obvious in Miyanaga Teru's case while in her younger sister's case, she really make her score blooms with Rinshan kaihou... a cheap hand become a dealer baiman in one turn. She didn't win as many hand as the older sister does, then again she doesn't have to when she can pull Rinshan Kaihou continuously as if it's out of fashion..."

Hisa hummed at that, "That's another thing people find similar in their playing style, showmanship wise... media loves their epic wins."

"I have witnessed it myself." Nodoka informed with stiff nod."People keep saying Rinshan Kaihou is her specialty, but it's more than that... beside it's ridiculous to be specialized in a yaku that based on luck like that." Never mind the fact whenever she did it Miyanaga Saki didn't even look at her tile before she tsumo them, it's just a coincidence. "It's not unstoppable there are ways to get around it."

"True..." Mako agreed, "But what is the odd of you to have your hand ready for chankan when she did her signature yaku?"

"She is strong." Nodoka admitted, "But luck won't hold out forever."

Hisa snorted, here goes Nodoka and her no nonsense philosophy. "Well... apparently it did for two years for both sisters." She quipped, "But Nodoka... if you're a normal player, it's true you can't specialize in that kind of yaku... but for national class monster like Miyanaga sisters, Amae Koromo... Jindai Komaki... it's just how they play. There are people who win with freaky method you just can't understand with logic. " She laughed softly, "Or as one of my acquaintances put it... players that loved by mahjong tiles..."

Nodoka narrowed her eyes, looking at the smiling girl who was interlocking arm with her sister. "If that nonsense true... it would be really sad that their love is not returned." She whispered to herself. After all... Miyanaga Saki didn't enjoy the game at all, she didn't find mahjong fun and yet... she was loved.

UPDATE: Fixed some stuff, Saki was a two time champion for individual... so both she and Teru dominate the championship two time in a row...

So I will set up a challenge for all Saki fans out there to try this concept... which pretty much mixing what have already done! We need more good fic in this section!
Not beta-ed but I hope it's readable ^^