Her older sister Chiharu. "What do you want Chiharu?" Yuriko said a little mad.
Chiharu wasn't really paying attention to Yuriko but she said "I'm just a little tired is all." As Chiharu walked towards Yuriko she noticed Yuriko's boobs. "What's this Yuriko did you grow some? Maybe you'll get to be as big as me and mom and then you can stop harassing me." Chiharu said to her.
'If only you knew' Yuriko thought with a smile on her face. "Yeah maybe." Yuriko said while looking at her boobs. Her bra was starting to strain her bigger boobs so Yuriko had to keep adjusting her bra to make it more comfortable.
"I remember when I grew, its gonna be a pain shopping for bras trust me." Chiharu said as she stroked her giant boobs. Then Chiharu walked to the fridge and opened it and noticed the soda "Hey Yuriko is this soda yours?" Chiharu said.
Yuriko was about to say to not touch it but then a thought occurred to her 'There's plenty in there, and I know the place that sells them so if I want more I can get more. Besides Chiharu isn't the brightest person in the world so I doubt she will notice the growth. Besides I've heard her belch after drinking soda, it isn't really a burp it's more like a rat yawning. I guess she could have one, after all I'll let her get a little bigger, Densuke will see her and be head over tits for her, then I'll get even bigger and win him over. It's perfect.' Yuriko thought to her self.
"Yeah they're mine, but if you want one you can have one." Yuriko said
"Aww thanks Yuriko." Chiharu said. Then Yuriko started to run to the kitchen 'I can't miss this.' she thought to herself. As she ran she had to make sure her boobs didn't bounce right out her bra again. When she got to the kitchen Chiharu was just about to have the drink. As Chiharu drank it Yuriko had a smile on her face and she noticed every time Chiharu took a gulp her giant breasts bounced just a little but still bounced.
"Ahh that tasted good." Chiharu said as wiped her mouth. Before the build up began for Chiharu, she asked "Can I have another one?" Yuriko still smiled and said "Sure." Chiharu grabbed another one and drank it. Once again her giant boobs bounced even from her swallowing the soda. She finished the second one and said "Thanks that hit the spot."
'Not yet' Yuriko thought.
Then Chiharu felt a build up in her stomach and Yuriko could tell by the way Chiharu was grasping her stomach. The build up was getting stronger in Chiharu as she moaned in pain for a second. 'Yes let's hear the tiny burp and then leave.' Yuriko thought still with a smile on her face. Chiharu looked around and said "Well since no ones here."
*BUUUUUUUUUUUUUUURRRRRRRRRRPPPPPPPP*
The belch was so big that it shook the very room. "Whoops. It's been a while since I've let one go that big." Chiharu said gushing with a smile on her face.
Yuriko just sat there with that same smile on her face but she was outraged "What?" she tried to say with a calm voice. Then Yuriko looked at Chiharu's boobs that bounced a little bit that started to push out wards. Slowly Chiharu's already big breasts were pushing the limits of her bra and shirt. As Chiharu's melons started to push out Chiharu was oblivious to it even happening. All Chiharu saw was Yuriko looking at her with a stunned face. Chiharu got a puzzled look on her face and asked "What?" But Yuriko watched in horror as her sisters boobs grew right under her nose.
Slowly Chiharu's breasts pushed her shirt and Yuriko saw as the shirt was losing the battle to stay together as she looked at Chiharu's cleavage grow even bigger. When it was over Chiharu grew 2 cup sizes and she didn't even know. "We should have a drink again." Chiharu said as she walked away. As she walked away she adjusted her bra while wondering why she was adjusting it. Even after Chiharu was gone Yuriko just stood there. She became mad. She found the soda. Chiharu never belches that loud and now she's huge! But then that mad faced turned happy as she said "She may have won the battle but I won the war." As she looked in the fridge and pulled out a two liter bottle. As she began to drink it....
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