Work Text:
Saki was beginning to grow incredibly suspicious.
Her brother was just obviously keeping secrets from her! What kind of brother would do such a horrible thing to his sister? Like, literally no brother would ever do that.
Ok, maybe alot of brothers do that! But not Tsukasa!
He used to walk into the house and yell to saki that he's home, most likely informing the entire neighborhood. Now, he just mutters "I'm heading upstairs" and hides his face from Saki.
Now, what on earth has Saki done wrong? nothing!
But Tsukasa can't hide forever, she notices his blush, and the way he grows redder whenever she mentions Rui. The way his expression softens and his talking grows quieter whenever he mentions the boy.
Saki notices everything after all.
Today was her perfect time to strike, Rui was coming over, and tsukasa thought she had band practice! She could catch them cuddling together or something!
Oh boy, Saki was so excited.
She had her 'ruikasa get together' groupchat on speed-dial. The groupchat being Emu, Nene, Mizuki, Toya, Akito (against his will), Ena and of course tsukasas own sister, Saki.
She arrived home from school a few minutes earlier than Tsukasa, so she chose her hiding spot. Under a table near the front door.
She was covered by a cloth, but could still hear Rui and Tsukasas conversation when they walked in, so she could work out where they were going.
For the next 10 minutes until tsukasa came in, Saki stalked her brothers social media accounts. He often posted backstage videos of his troupes performances, and exercise videos...?
Every now and then, there was a picture of him and Rui. Rui would often be in a position meant to tease or fluster tsukasa; like with his arm around his shoulders or holding the shorter boys face gently.
Both boys were blushing in each of these pictures, and Tsukasa seemingly rarely sent pictures of him with his other troupe members. Now, that could just be that he spent more time with Rui, but-
"Tsukasa-kun! Thank you so much for inviting me over~"
Aha! They're here, time for Saki to listen closely!
"Don't worry Rui, you're welcome anytime! Shall we head upstairs?"
She heard her brother do a spin, most likely posing, before hearing two sets of footsteps head upstairs. After waiting for a few seconds, she slipped out from under the table.
Since Tsukasas bedroom was a balcony room, if she got the correct angle she could see what the two were doing without them noticing her! She was simply a genius!
★
The two didn't do as much as saki expected, the most physical affection being Rui laying in Tsukasas lap. Saki sighed, they didn't even kiss! Although, maybe she sighed a little too loudly, because she heard a loud voice call out to her.
"SAKI! THANK YOU FOR WATCHING US THIS ENTIRE TIME!"
Ah, shit! When was she found out?! She thought it was only when she sighed!
"BIG BROTHER?! H-how did you see me?"
She did her best to convince her brother she was sad, but it was just no use!
"HAHA, SAKI! YOU CANNOT FOOL ME!"
Saki gave up, she would just interrogate him tomorrow. For the time being however...
She stopped Rui just before he walked out the door.
"Rui Kamishiro. We need to talk. Not now, but soon. Be ready."
Rui seemed surprisingly calm considering how evil and intimidating she was acting! How disappointing.
Her thoughts of sorrow were stopped by a loud voice screaming Ruis name, and her brother wrapping his arms around Rui before bidding him farewell.
At least Saki had some more physical affection to tell the group chat about.
★
Saki was getting bored, it had been weeks since Rui last came over, and she was the only person home! Again!
There was no school for any miya girls students today, and all day Saki had been bored out of her mind! She couldn't wait for Tsukasa to get home so she could finally get around to interrogating him.
She managed to find Ruis social media accounts, and his were a mix of surprisingly cute posts and some absolutely crazy shit Saki couldn't even understand.
He had a lot of posts about tsukasa, actually. He often reposted pictures or videos of cats cuddling with the caption 'me and tsukasa-kun :3' or something like that.
He even posted a few pictures of tsukasa, calling him cute or saying how brilliant of a performer and person he is.
Although Saki wanted to gag watching her brother get so much affection, it made her extremely happy that Tsukasa had found someone so perfect for him.
Rui and tsukasa even had matching profile pictures on one platform! On here Rui mostly posted pictures of platypuses and about how vegetables are not fit for human consumption. Which is...valid, she guessed.
After waiting for what seemed like hours, she finally heard the door open! But it appeared she heard two voices?
One was softer, and significantly more gentle. An absolutely gorgeous voice, while the other was her brother.
This has got to be Rui.
"Th-thank you for walking me home Rui.."
Definitely 100% Rui. Tsukasa sounded different though, he seemed quieter, and his voice was laced with fondness.
"Fufu~ anytime, Tsukasa-kun~"
Ruis voice almost had a flirting tone to it, perhaps saki should just peak around the corner, check that they weren't up to anything strange.
Saki completely regretted checking around the corner.
Rui had one arm wrapped around Tsukasas waist, the other lifting the shorters chin, while tsukasa had his arms around Ruis shoulders, their noses touching and their lips mere centimeters away.
Saki watched in horror as their faces got closer and closer, until she saw the two press their lips together. Their faces were right red, but they both seemed to be smiling into the kiss.
Saki really wanted to gag.
"Bye bye tsukasa-kun!~ I love you!"
Before Saki knew it, Rui was gone and Tsukasa was staring at her in utter horror.
Oh boy, he had a lot of explaining to do.