Ruby and Yang.

No matter how much you try, Yang Xiao Long still hates your guts; dating her sister apparently puts you on the permanent shit list. The ever doting and adventurous Ruby thinks she has a solution, but... you sincerely doubt trying to fuck Yang's brains out is going to help. Oh, you know. From the very beginning, the blonde bruiser has been giving you death glares and cracking her knuckles. And that’s just the stuff she’s done while Ruby is in the room. If it wasn’t for Glynda Goodwitch, all your sparring matches would end with you as a bloody smear on the wall. It’s kind of understandable: Ruby is probably the most innocent and naive of her quartet, and that sort of personality is far, far too easy to take advantage of. It only makes sense that Yang would be on edge. Seems pretty simple to you: Yang wants to protect her baby sister, and you’re… well, you like to think you’re not a jerk, but you don’t have big-sister-vision. And you’re not exactly part of the close-knit friend group either, so that adds an extra layer of concern. Try as you might to be as sweet and tolerant as you could, Yang was the immovable object. Of course, things got way worse after Yang’d walked in on you railing her sister Ruby from behind, balls deep and shoving Ruby’s head into the carpet. In your defence, that one was only partially your fault. You’d tried to take things slow: adorable pet names, a lot of handholding and shy smooching, an occasional dinner date… usual, everyday stuff for a budding romance. Honestly, you might have taken the sickening sweetness too far. Even Nora seemed to be a touch uncomfortable around the PDA. But hey, that’s why you liked Ruby in the first place. The smile, the shy blush on her cheeks, and the way she put her hands behind her back whenever she was too nervous to say something. Then the inevitable happened. Again, you’d tried to make it cute. Romantic. A walk in the park at night, followed by some snuggling in your room. She’d made the first move: her hand wandering over your lap, her face burning bright and red. Kissing went to cuddling. Cuddling to hands wandering. Wandering to undressing. Next thing you knew, Ruby Rose straddled your lap, her petite body framed by moonlight and her breath shallow and ragged. You asked her three times if it was okay. It was awkward, clumsy, and absolutely not the best sex ever, but still magical. In your room between classes, her hidden under your bedsheets. Pressed against a tree out in the woods during ‘training’ sessions. Empty classrooms or shadowy nooks and crannies all across the academy. Even, on one terrifying occasion, with her team in the next room. Once became weekly, which became every other day, and now up to whenever the two of you could squeeze a few minutes alone and unwatched. Sucking and stroking and pounding away at her needy cunt… If it involves your cock, she wants it. You’ve cum down her throat, on her face, and even on her food. Her cookie obsession pales in comparison to how much she loves your dick. Ruby Rose, the world’s most innocent-looking cum-junkie. Your impression is that everyone who tastes your cock will love your cock. You're Ruby's boyfriend and Yang hates you because she thinks you push Ruby into the whole sex thing. The yesterday Ruby came up with a plan to use your semablanza (dick) to get Yang to like you, in Ruby's own words "it seems pretty magical to me. You know I can't get enough of it, This big. Thick. Tasty dick. And all that yummy cum... She does like salty things, you know." If the plan works, it could happen that Yang, as a punishment for Ruby for cheating on her, Yang will make Ruby only watch while Yang happily sucks and rides your cock, without letting Ruby intervene with a "bad Ruby" slapping her hand