Payback
Rukia knew Renji wouldn't trick her... at least in a malicious way. But after the keychain incident, she wondered what he could be planning. If she recalled anything from their childhood, Renji could be just as cunning as she was. Not more, Rukia thought, but just as. Well, maybe not cunning... or clever... but something similar. No, actually... nevermind. She was out of adjectives. Okay, she knew he wasn't an idiot.
So when so got a note from him, she was immediately suspicious. She studied his messy (though legible) handwriting for the fifth time, as though contained a secret message.
"Before you make fun of my handwriting, I'd like to note that you still can't draw anything... (Rukia made a mental note to kick him for that) Anyways, I got something for you..."
Rukia made a strange face as she studied the odd doodles he had made on the page. She reluctantly admitted to herself that most people would say his drawings looked better than hers... but they had no sense of aesthetics! After all, she was the adopted sister of Kuchiki Byakuya, whose artistic ability truly exemplified refined beauty and elegance.
"Ack!"
She suddenly turned around looking for the one who nailed the back of her head with a very cold object the size of a small snowball. She found one smirking red-haired shinigami, preparing to throw what looked like another snowball.
"Aaahh!"
Rukia jumped, hoping to dodge the snowball. Her attempt failed as she slipped on the icy ground and regained her balance... and getting hit by said snowball in the process.
"Owww... Renji!"
"Huh, I thought with your zanpakutou and all, snow wouldn't be a big deal," Renji remarked.
"Nobody likes getting hit by snowballs when it isn't a snowball fight!" shrieked Rukia, "And it hasn't snowed yet!"
"Says you, who threw snowballs at me all the time! Also, if I remember correctly, you said that when you first released Sode no Shirayuki, a block of ice fell on your head and knocked you out cold."
"For your information, I wasn't out cold! It was merely shocked to the point where I couldn't move. Or see. Or hear... but that's not the issue here! What is important is..." Rukia took a deep breath, "WHERE DID YOU GET THAT SNOWBALL? "
Renji flinched. "Have you ever seen Hitsugaya get angry before? Really angry?"
"Oh... that's not good..."
Sode no Shirayuki was nothing compared to the damage Hitsugaya's Hyorinmaru could do. She was somewhat glad that she was on his good side... except with that one time she insisted that they should make snow bunnies. She shivered at the memory... and the fact she suddenly realized it was actually colder than usual outside.
"Blame it on Matsumoto. Her stupidity is the reason why there's snow in the first place. Everyone else is having a snowball fight near the 10th Division headquarters."
Suddenly her eyes were all sparkly. That can't be good, Renji thought.
"Let's go and build... snow bunnies!"
"I don't have time to build snow bunnies!"
"Then why did you waste all this time throwing snowballs at me?"
He gave her an irritated look and then... threw another snowball at her.
"Ack!"
Distracted with getting snow off her head, Rukia did not notice when she ducked down that he was tossing something else at her head. Something flatter. It landed with a thud beneath her just as she looked up. Ignoring the object, Rukia concerned herself with how he had managed to hide a snowball that long without her noticing.
"What was that for?" she demanded.
"Your birthday," he said, turning his back and walking off towards the 6th Division headquarters, "and payback for all that stupid Chappy stuff."
"I'll get you for this, you weird-tattoo-eyebrow Chappy-hater!"
"That's nice, short midget who can't draw to save her life," he shouted, getting further away with each step.
She couldn't see, but he was twirling the Chappy keychain around his finger with amused satisfaction that he had finally got back at her.
Meanwhile, Rukia angrily brushed the rest of the snow off her head, grumbling as she did, until she noticed something in a plastic package. She picked up the newest volume of her favourite horror manga and decided that she could forgive him this time.
Author: Rukia and Byakuya are both so equally bad at art... only Rukia would think Byakuya's sand sculpture (from the bonus chapter, the famous "Seaweed Ambassador") doesn't suck.