DISCLAIMER: I DO NOT OWN LUCKY STAR. IT'S KAGAMI YOSHIMIZU'S PROPERTY. THIS IS A FANFICTION.
"Hey, Onee-chan..." Tsukasa Hiiragi asked shyly, after tem minutes of silence in her room. Kagami raised her eyes from her math book.
"What is it?" Asked Kagami.
Tsukasa shifted uncomfortably and turned the book's page, not really paying attention to what she was reading.
"I sort of have a question…"
"Sure. Are you having problems with the exercises?"
Tsukasa blushed and turned another page.
"It's not really related to math…"
Kagami cocked her head to the side, confused.
"Then what is it about?"
"Well…" Tsukasa turned another page on her book. "It's about something that's been bugging me for a while."
"C'mon, you're scaring me already. What is it?"
Tsukasa scratched her chin and smiled sheepishly.
"Well… You know when you turn the computer on?"
Kagami raised an eyebrow.
"I've been wondering…" Said Tsukasa, turning one more page. "Why when we need to turn the computer off, we need to click the 'Start' button?"
There was an awkward silence in the room while Kagami tried to process what she'd just heard. Tsukasa only stared at her sister with an expression more described as expectation. A couple of seconds later, Kagami sweatdropped and returned the stare, but a lot more violently.
"I'm sorry! I'm really sorry!" And with that, the spacey Tsukasa turned her head rapidly to the book on the table. But she didn't calculate well, and what happened was a slamming sound, followed by another yelp, and another sweatdrop from Kagami Hiiragi.
REAL FACT: I was studying for my exams and all of a sudden my grandmother asked that. I wasn't able to concentrate anymore.