Yang was in her room, the rest of her team currently off for dinner. She had had a long day, and as much as she enjoyed fighting, she still needed to relax after so long.
Yang was different from most girls, and was well aware of it. She had a penis, a long, big, and thick one.
Yang was very good about keeping it a secret. Even Ruby forgot about it sometimes. In all honesty Yang didn't care what people thought about her, but she didn't want to end up getting kicked out of school over some stupid fight, so she laid low. But right now, she was alone and needed to de-stress. She locked the door and dropped down onto her bed.
She lied on the bed, grabbing a magazine from under her bed. Yang opened the magazine to a random page, seeing two girls going at it. She smirked, reaching down to free her slowly hardening length.
She soon got her shorts and underwear off, and began to stroke her cock. She started slow, but soon was stroking her cock fast. Yang moaned softly, trying to keep one eye opened so she could still see the pictures of naked women on her magazine.
After a dew minutes, she was stroking and moaning, so much she didn't hear the lock click and the door open. Ruby had a surprise seeing Yang stroking her hard cock. Yang was paying attention to the magazine, oblivious to her sister walking in.
Ruby was confused for a moment, her mind not registering what was happening at first. When she got what was happening, she blushed hard. "Um..Y-Yang?"
Yang stopped, before she put down the magazine to see her little sister Ruby. She had her cock in her hand and she blushed as red as her sisters hood. She was like a deer in the headlights.
The room was silent for a moment, but Yang couldn't stay still for long. She moved back, trying to cover herself. She could handle being made fun of, she'd done it in the past, but not by Ruby.
Ruby then used her semblance, super speed, to get to Yang before she could cover herself up. Ruby still remembered once a few years ago; she had started watching Yang play with her cock in their room, and touched herself to it whenever she could.
Yang froze when Ruby grabbed her, "W-what are you doing Ruby?"
"I..I actually forgot you had a cock sis, it's been awhile since I watched you play with it in our room. It looked...good." Ruby said, both turned on and mesmerized at her sisters body. Yang thought for a moment that she should try to resist it, but knew she didn't really want to. She grabbed Ruby and pulled her onto the bed, kissing her hard.
Ruby didn't resist, she cared for her sister and had always wanted to try and pleasure her sister for everything she did for her. Ruby then moved her hand to Yang's cock, her small hands stroking it.
Yang moaned, loving the feeling. She pushed her tongue into Ruby's mouth as she thrust against her hands.
Ruby was losing herself to the moment, before she removed her mouth from Yang's, "Yang, can I take off your clothes?" She asked, with those cute silver eyes.
Yang smiled, "only if I can take off yours." She said with a wink. Ruby nodded yes, starting to remove her sister's top. Yang let Ruby remove her top, showing off her larger breasts.
Ruby stared at the orbs of flesh, before she began to suck on one and started stroking Yang moaned more, pushing her hand under Ruby's skirt and rubbing her crotch.
Ruby started to moan at the feeling, and accidentally activated her semblance, so now she was stroking Yang's cock at hyper speed. Yang yelped loudly, cumming into Ruby's hands.
Ruby wanted to apologize, but seeing the cum on her hands, she licked it. "Tastes salty, but sweet too." Ruby said in the cutest most innocent way possible. Yang couldn't help it. She grabbed Ruby again and began to undress her.
Ruby was now naked, her boobs weren't as bid and her figure as developed, but she had beautiful skin and just enough bumps to extenuate her figure, "Do you like it, sis?" Ruby asked, her blush and cute expression making Yang giddy.
"You look amazing Ruby." Yang assured her, pulling her back into a kiss.
Both continued, before Ruby stopped stroking Yang's cock and went to her pussy, "Yang, I want you inside me." Ruby said, pleadingly. Yang smirked, "you sure sis? I might be a little too big~" she teased.
"It's okay, if not I can always tell everyone you like to masturbate to naked pictures of Coco and Velvet." Ruby said with an evil grin.
Yang blushed, but namely because she had in fact had a few fantasies about the two, often at the same time. "You asked for it~" Yang pinned Ruby under her, lining up to her slit, "But don't say I didn't warn you~"
Ruby gave a determined look of bring it on, and Yang impaled her cock into Ruby. Yang then noticed two things: 1 Ruby's hymen was already broken, and 2 her cock went all the way to the base. Ruby winced slightly, but felt only pleasure.
Yang was surprised, "Looks like my sweet innocent little sis hasn't been so 'innocent' after all~" Yang teased, beginning to thrust in slowly.
Ruby blushed as she felt Yang's cock, "There was a cute boy I liked in my class at Signal, we hung out for a bit then after a while...it just happened, it wasn't bad." Ruby said, Yang then started to thrust harder and deeper, the story turning her on.
"Tell me more~" Yang moaned, holding Ruby's hips and thrusting in harder.
Ruby tried to speak, but it mostly came out as moans, "We went on a date on Patch, a little secluded hill. When we got their, we started to kiss, he was a little forceful at first, but got better as it went on. He asked if I wanted to do it, I said yes. He wore a condom and broke my hymen, it hurt at first, but soon turned into bliss. We had sex for about an hour, before I had to come home. He had to leave a few weeks later, we broke up on good terms." Ruby said, right as Yang hit a sweet spot.
Yang groaned as she picked up the speed again. She wasn't sure why, but the thought of her sister getting f*** just riled her up.
Ruby then decided to try something, "Hey Yang, does your semblance work for sex too?" Ruby asked as she slapped both of Yang's breasts and bit into her shoulder.
Yang grinned, "You know it~" She said, ramming in harder.
Ruby moaned as Yang's semblance was taking effect. Ruby began to punish Yang's body more, making Yang fuck harder. After a few minutes, "Yang, I'm getting close." Ruby moaned, her brain almost smashed.
By this point Yang was shaking the whole bed, which caused the bed above to shake as well. Yang groaned, getting close herself.
Ruby soon came, they were kissing so it muffled the moan, but Yang came after, her cum smashing deep into Ruby.
Yang panted, pulling out slowly. "That was great~" Yang said with a grin. Ruby smiled, "That was amazing." She said as she nestled her head in her sister's breasts.
Yang held her sister close, enjoying the afterglow. As they started to nod off, Yang's mind started to wonder to some of the other girls at Beacon...