Yang decides to play another prank on her

Ruby flushed red. "Let's hope not! Now if you'll excuse me, I'm gonna go try and find our friends, who hopefully won't embarrass me!"

As Ruby turned to go, a devious thought entered Yang's mind. A truly evil, nasty idea. Placed oh so perfectly beneath the red tinged tips of Ruby's short hair was the neat little bow that she had tied the strings of the top into. The loops looked big enough to fit a finger in...

Yang quickly placed a hand on Ruby's shoulder; Ruby shot her a scowl. "Ruby wait. Look I'm sorry, ok? But tradition is tradition, ya know? I just... wanted to give you a taste of home, since this is your first birthday away from Patch."

Ruby's expression softened. "I... guess I can follow that logic. It's fine, Yang. Just don't do that again tonight, please?"

Yang's face split into a beaming expression that almost blinded Ruby. "I solemnly swear that I won't pants and spank you for the rest of the night." And with that, she discreetly pulled one of the bow loops with her thumb. "I think I see Weiss over there," she said, patting Ruby's shoulder and then giving her ass a swat in Weiss' direction. With a yelp Ruby started forward, rubbing the sore spot. Yang held back a step, watching as each step shifted the strings in the bow, making it looser and looser, till by the time they reached Weiss, there wasn't even a bow anymore, just the strings resting on her neck.

"Weiss, hey! I've been waiting for you!" Ruby said, waving to get her attention. Weiss, dressed in a form fitting white ballerina costume complete with tutu and tiny crown, turned to greet Ruby. And promptly did a spit take.

"R-Ruby!? What the hell are you wearing, you dolt?"

"You like it? Yang got it for me for my birthday!" Ruby said, adopting a heroic pose.

"Yeah, it's supposed to be this hero from an indie comic that's exploded in popularity back on Patch," Yang lied through her teeth.

"Oh really? Huh, neat!" Ruby said enthusiastically. Then she struck a more epic hero pose with more effort, causing her breasts to bounce. Which was the final effort needed for the strings on her top to slide off, releasing all the tension holding up the cups for her top. They flopped down, baring her breasts right to Weiss, who blushed a bright crimson.