"This should silence that blonde brute," Weiss grumbled to herself as she pulled a little glass bottle from her uniform jacket pocket. She uncorked it and down the lavender coloured liquid in one go. She set the bottle down on the edge of the bathroom sink and waited. She could feel the warmth pooling in her chest, a sign that something was about to happen. Then, in one sudden moment, her breasts surged forward. Nothing could stop them, not Weiss' bra, nor her blouse, each of them giving out under the power of Weiss' rapidly expanding breasts. Weiss' bra hook snapped, opening and hanging uselessly, letting her breasts be free of what would have been some noticeable strain. The buttons on her uniform shirt burst and tore off her shirt, flying across the room and bouncing off the walls. Weiss reached under her shirt and with some agile manoeuvring she extracted her ruined bra. She then slipped her hands back under her shirt to cup her newly improved breasts. Each one filled a hand and then some, their considerable weight causing Weiss' hands to sink in to the soft flesh and spill over the sides. They each jutted out so far that when Weiss looked down her view of her own feet was obscured by them, her pale skin and deep cleavage filling too much of her field of view. Weiss delighted in the wonderful jolts of pleasure that shot through her body as she squeezed and massaged her expanded breasts, with even the slightest, quietest moans squeaking past her lips.
After a few minutes of enjoying herself Weiss turned and marched proudly out of the team's bathroom and back into the dorm room. The only head that turned initially was Ruby's, but she had quite the reaction to Weiss and her almost exposed breasts.
"Woah, Weiss, what happened to you?" Ruby exclaimed, catching the attention of the rest of the team. As Blake and Yang looked at Weiss their jaws literally dropped.
"Jeez, Weiss, I think they're bigger than mine," Yang commented, her eyes flicking down to Weiss' chest almost subconsciously.
"I know they are," Weiss stated with full confidence. "I also know that no one will be calling me 'flat' again, isn't that right Yang?" she added rather pointedly. It took a moment for it to land, but when it did the realisation was plain on Yang's face.
"You… you did this all because I called you flat?" a very baffled Yang asked. "I-I didn't realise it bothered you that much, I'm so…"
"No need to apologise. After all, I'm very satisfied with my new body. Of course, it looks like you have some catching up to do," Weiss teased.
"You're on, Weiss. By the time I'm done, you're gonna look flat again compared to me," Yang bragged. Blake facepalmed beside Yang.
"This might be the stupidest rivalry ever," Blake deadpanned.
"You won't be saying that once you start perving on the sexiest rivals in Beacon," Yang teased.