1 - 20 of 62 Works in Good Sibling Tenma Saki
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The Supernova That Was You by Starry_FriedRice
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
26 Sep 2025
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"Tsukasa written as ruler of the skies, and Tenma written as soaring Pegasus! The piano prodigy and dazzling actor. His name is Tsukasa Tenma, Age eighteen! And the world's future star!!"
People looked at the boy, who was posing strangely while laughing and talking to himself, some whispering to their friends.
"What a weirdo, right?"
"Is he mentally ill or something?"
"Don't engage or he might talk to us, my reputation would be done for!"
—
Or maybe he had just come off as annoying.
Tsukasa Tenma, now age twenty three. The man who spends all his time in his room composing music for a living. He plans to keep it that way, but what happens when he encounters some old acquaintances?
OR: Tsukasa goes emo and then reunites with the homies and becomes THE world future star again (real not clickbait!).
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The 5 times Toya called Akito "Shinonome", and the one time he called him Akito by Any_how
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
28 Aug 2025
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“So cold, and we just met. Do you seriously believe I won't be on your level?”
“It’s not like that!”
“It’s just— We just met! It wouldn’t be polite of me to just call you by your first name right off the bat.”
“Dude, it’s fine. Just call me Shinonome-kun at least?”
...
The 5 different times Toya called Akito some form of "Shinonome", and the one time he called him "Akito". Buckle up for a fic with way too many cheesy tropes and insane pining from Akito!
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Painting Shattered Dreams by Mysterious_Reader1864
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
28 Aug 2025
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Main Story Part 1:
Saki Tenma’s brother has been sick for a long time, losing his usual spark and giving up on life as he waits for his time-limit to give in. She comes across a famous unit known as Vibrant Pink; a unit that inspired her to make her own. Meanwhile- a member of Vibrant Pink is in trouble with her own problem…Series
- Part 1 of (AU) — CARRY ON
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The Shooting Star I Wished Upon. by Dxzaii_1
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
18 Aug 2025
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Saki Tenma was chronically ill as a child, and still was as a teenager. After wishing upon a shooting star to recover completely and be free from this horrible illness, what happens when she realizes her actions have consequences?
(Saki/Ruikasa Angst)
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Street Cats by Turtle_The_Bean
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
06 Aug 2025
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While walking home from school one day, Toya and Saki encounter a stray kitten and decide to take it home.
Series
- Part 3 of Tenma Sibling Chaos
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The Choices of A Star Captain- ITHACA SAGA by BluBerriePies
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game), EPIC - Jorge Rivera-Herrans (Albums)
28 Jul 2025
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"When... Does a man become a monster?"
20 years of waiting... Saki had been waiting 20 years for her brother, and the strangers making a home out of his palace have been growing more and more impatient. Will the heavens align for her to see him again? Or would she have to face her oppressors and fall under their thumb..?
OR
Part 9 to my EPIC x Prosekai au!
Series
- Part 9 of The Choices of A Star Captain.
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Possibly Leaving You For the Stars by elusive_lucien
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
22 Jul 2025
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Tsukasa has been isolating himself lately, from his friends, family and concerned Virtual Singers who try to help. But what could be the cause?
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Holding Onto You by spurbel
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
14 Jul 2025
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Saki had been Tsukasa's entire world from the moment he could remember. He doesn't believe there was ever a time where his world didn't revolve around her.
From the moment she was born, he couldn't take his eyes off of her. He didn't care that he was no longer the sole focus of his parents world, not when their attention made his little sister smile so brightly.
And Tsukasa would do anything to protect her smile, even if it means silently destroying himself in the process. Because as long as she smiles, Tsukasa is happy.
But then, why does she keep looking at him like that?
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my dear star ☆ ( Ruikasa ) by emus_left_eyebrow
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
06 Jul 2025
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Rui is crushing on Tsukasa, and he's starting to make it painfully clear. But will Tsukasa notice?
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Sleepover Together by Turtle_The_Bean
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
03 Jul 2025
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After finding out Saki is having a sleepover with the rest of Leo/Need, Tsukasa joins in on the fun. Chaotic fluff ensues.
Series
- Part 2 of Tenma Sibling Chaos
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kamishiro rui is my name by Its_4am_letmeread, Not_So_Cute_Now
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
24 Jun 2025
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Sociohysteria and much other words that I could make up by Ke_ith
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
10 Jun 2025
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"Listen to me carefully kid. I know this will sound like something impossible and too harsh for you but you must kill Shinonome Akito before it's too late. I'm saying again, it's not up to your fucking choice Tsukasa! KILL SHINONOME AKITO
BEFOREEVER̴͇͌̀̆̍̽͝͠ͅ️Ỵ̷̡̛̟̱̑̍̀̉̿̿̉T̶̢̧̨̝̺̺̿̑͆̀͋̎̅̓͘̕͝Ḩ̶̳̣̮̻̪̜͍̹̭͓͍̳̼̈́̅́̄̍̀͐́̊̽͌̊̂͂͠͝͝I̸̡̛̳͌̉͋͐͒̍️N̴̟̬̠̣͍̹̜̠̘̮͎̥̜̳̖̋͋͛̆́̂̀̅̓̕ͅͅG̶̨̛̼̹̮͚̻͔̘̣͉͈͚͉͈͚̏̈́̿̅̀̏̀͌͒̀̐̇́͘-"
Silence.
.
Yes this is an akikasa fanfic
(Please bear with the terrible written first 2 chapters I'm really trying to fix my writing)
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a flower bloomed for you (one day, it will wilt) by estrei
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
05 Jun 2025
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I don’t want to be alone anymore.
Perhaps it was a little naive to believe in the stories and folktales of the Goddess granting mortals wishes. Perhaps it was a little dangerous to put faith into a being he had no proof existed. Perhaps he was putting too much faith in his own magical prowess. Perhaps it was almost selfish to accept such a gift.
Perhaps all of this was true, but something deep in Tsukasa’s heart believed he was meant to meet this boy, whether he was created by his deep unspoken desires and the Goddess’s blessing or not. None of that mattered right now, not when everything about his life could change right at this moment.
Or,
Tsukasa is given a gift worth much more than just a bouquet of lilies.
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Our Birthday by Turtle_The_Bean
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
25 Apr 2025
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After taking Toya to meet his sister, Saki, for the first time, Tsukasa finds out some horrible news that turns his plans for a birthday party into an impossible feat...
Unless he changes his plans.Series
- Part 1 of Tenma Sibling Chaos
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If it makes you happy I’ll do anything by Croussant
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
19 Apr 2025
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Banging your ankle before performing a show for your sister isn’t ideal but that’s fine for Tsukasa because the show must go on!
Or
Saki shouting at Tsukasa for overworking himself like an idiot
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Tsukasa's lonely fever by Maxminions
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
04 Mar 2025
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Summary
" Wait!" Tsukasa grabbed Rui's wrist, preventing him from going any further " Don't go."
" I...I don't want to be alone." Tsukasa stopped for a moment, lowering his head in shame " Not when I'm like this again "
Something inside Rui's mind clicked as he had a pretty important realisation.
" Tsukasa-kun...has this happened before?"
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The day starts off wrong, Tsukasa didn't go to school and no one is able to contact him. After a chat with Toya, Rui decides to take matters into his own hands, only to later find out that Tsukasa is sick from feeling lonely.
Quite literally.
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Torturing Tenma Tsukasa Because I Never Got a 4* Card Of Him by eats_ur_angst for Nootmare101
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
24 Feb 2025
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I decided to take inspiration from all those talented authors and make my own torturing tsukasa fic!!! wooo!!! this is my first fic and english isn’t exactly my first language so,….. yeah!!!! Enjoy!!
PS: i think i gifted this to nootmare so tada gift for nootmare -
Tenma's Valentines Day Operation! by Anzu_zuzu
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
15 Feb 2025
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Saki and Tsukasa make chocolates for Valentine’s Day!
Hopefully they don’t run into any problems!
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(Un)Familiar Reality by Sparklepool101
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
11 Feb 2025
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It's been seven years since Toya was kidnapped on his way home from school, six years since he woke up with wings on his back, and three years since he finally met others like him.
Now (with a little help from the outside) they finally have their chance to escape. Their chance to go home.
If only they knew how to get there.--
OR, a vaguely Maximum Ride inspired AU following the close game/OFFLINE group featuring as much found family and fluff as possible !!Written for the 2024 Project Sekai Big Bang! Link to the art inside <3
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Harpoon to the Heart by bonsaikitteny
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
11 Feb 2025
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(Abandoned permanently)
Tenma Tsukasa stabs Kamishiro Rui with a harpoon
AKA
The Edo period whaler Tsukasa x mermaid Rui AU no one wanted but I needed