Blake was your average 17 year old kid. Decently tall, simultaneously both muscular and scrawny, tan skin (Puerto Rican on his mom's side), with messy brown hair and brown eyes. He was pretty popular, spending his days with friends, playing sports, and messing around with video games.
But, he wasn't an only child, as much as he wished he did. There was his little sister, Cassidy. She was 11, and in the awkward puberty phase, where she was either whiny, having a hormonal meltdown or, decently normal. She was the total opposite, a major geek, with tortoiseshell glasses, braces to fix an overbite, messy black hair, pale skin, and big green eyes. While he was busy dicking around on a guitar, or killing another boss. Her nose was buried deep in a book. They always fought but today it was all going to come to ahead.
"Blake! Give me back my book asshole!" As she jumped up and down trying to grab her over-sized textbook from his hands, just out of reach.
"Next time stay out of my room, you little creep." With that classical, impish grin. Waving it around. "I'm serious, I have a huge test this week! I can't have you screwing it up for me!" Their yelling was interrupted by their father, "Blake! Cassy! What's going on up there?"
"Uh, nothing!" Both said in unison. "Blake! I'm serious!" Cassidy hissed, "Give it back right now" His face morphed into a smug sneer, "Okay, you want it so bad? Here" whipping his arm back, sending the book flying over her head... and directly into a window. The textbook, demolished the window, sending streaks of glass their way, "What the hell was that! Cassidy! Blake! Get down here right now!"
Both siblings sat sheepishly on the couch, their scowling parents staring them down, "So, which one of you was responsible for this?" their mother asked. "Look" Blake started, "Yeah, I threw it. But, she kept barging into my room." She gave him a side-eye, "Well, yeah, because you kept playing Halo, at max volume, I need to study."
"Well, you're father and I have decided on your punishment." They sat and waited, expecting the classic no phone or something, "You'll be switching heads for...the foreseeable future" Their jaws went slack, "What!" Blake retorted, "I'm not being stuck on her body."
"Yeah" Cassy said, surprisingly in agreement with her older brother, "I don't want to be him for like a month."
"This isn't up for debate. Now, head's off." Their father said, they groaned but complied, popping their heads off, and slowly placing them on each other's bodies. Blake looked up, his sisters pale, geeky face clashed with his muscular, tall body. Just as much as his clashed with her skinny physique, long limbs and pale skin. But, she was developing, and had a decent pair of C-cup breasts. His libido got the better of him, wrapping his hands around them, giving them a light squeeze, only to receive a slap from his own hand, "Ewww, get your hands off my tits you pervert!"
"Kids, quit arguing and go to your rooms. We'll discuss your punishment later." They slunk off, Blake catching his sister feeling her new crotch, but decided not to snap back for once, deciding to do some exploration until their parents called them back for the extra details.