It's starting to feel like a Sunny day.

By this point, you're fairly certain that whatever being granted you this amazing world is also keen to **** you. You've barely had a moment without a boner since your exciting breakfast this morning, and you've cum more in a handful of hours than you normally do in a week. Even now, looking down at your sister's naked form, your seed gently flowing from her nethers as she clacks away at her game, you're more worried than anything. Will you ever get rid of this erection? Will your lust be insatiable for the rest of your life? Then you come to the startling realisation that frankly you couldn't care less, considering you will almost always have an avenue of release, regardless of time, place or occasion.

A knock at the door brings you out of your contemplation, your sister leaping up to go answer it.

"That's probably Sunny," she mentions as she wanders by, unlocking the door and pulling it open. On the other side isn't the expected Sun-Hee, but instead a particularly flabbergasted delivery-man. Staring open-mouthed between your naked sister and you, it takes him a moment to collect himself, producing a box coated in EXPRESS labels, along with a pen and form.

"Um, sign here, please." You take the piece of paper and sign, watching as the man tries his hardest not to look at the cum working its way down Mei's inner thighs. Wishing the man a nice day, you take the box out of his hands and shut the door. Mei looks over, curious.

"What did you get? You don't normally order stuff ... " With a smirk, you give her a quick shrug and escape to your room, tearing the box open.

Exactly what I was waiting for, you smirk. A surprise tool that will help us later stashed away for the time being, you go to see what your sister is up to - at the same moment as you hear the front door open. Thinking you might ease poor Sun-Hee into this situation without your cock being the first thing she sees, you wait around the corner and listen.

"Hi Mei-- oh! Uh." Sunny has evidently seen your sister. "I .. brought your homework."

"Oh my gosh, Sunny, I totally thought it was you before, but this mailman was there ... " Chatter fills the room as you hear the door click shut again and shoes come off.

"Oh, Sunny? Remember what I said on the phone?" There's a moment's pause.

"You mean, your brother? And, um, **** you? And ... oh, and everyone in the house ..." Another pause. You can almost hear the cogs turning in Sun-Hee's head.
"Yeah, he's probably going to **** you too - that's why I'm naked, don't want our clothes to get dirty. Here, I'll help you, just put your clothes over here."

You come around the corner to see a pretty fascinating sight - your sister pulling her best friend's skirt and underwear off as that same friend removes her bra. Sunny's always been an article of interest in your late-night ponderings, not tall and muscular like your big sister, not petite and slender like your little sister ... if you had to call her anything, you might be inclined to use the word 'shortstack'. Slightly shorter and somewhat less slender than Mei, but with a decent bust and an ample amount of hips and butt, she's big where it counts in a tiny, adorable package. She has straight black hair, cut short into a neat bob, accented with thick-rimmed glasses that amplify her dark brown eyes. With a round face and a timid expression, she's always seemed to be that typical shy-but-sweet nerd girl, the kind you just want to hug and cuddle ... and currently, fuck silly.

"Ah!" Sunny notices you. "Ahh!" Sunny notices your erection. "H-Hi! Hi John! Um!" She's totally staring right at your cock, cheeks bright red as Mei finishes pulling off a pastel pink pair of panties off one of her legs. You take one step closer and she starts, taking a step back. Trying not to chuckle, you take another step forward, and she takes another step back. You repeat a couple of times, as her eyes flick back and forth between your dick and your face before she bumps into the closed door behind her with a solid thud.

"Sunny, geez, calm down!" Mei laughs at her. "You better get used to seeing John naked already, it can't be helped!" Sunny takes a deep breath as she rubs the back of her head.

"Y-Yeah, I guess it can't be helped. He's going to **** me with that big, hard thing ... going to stick it right inside me and stir up my insides ... going to pound me until I scream ... c-can't be helped!" Somehow, you get the feeling that she's a little bit more into this idea than she lets on. Mei grabs her by the arm and drags her past you, scooping up Sunny's school bag and leaving behind an assortment of school clothes.

"Oh, hey Sunny."

"H-Hi boobs-- Rose! Rose! Hi Rose!" Your older sister comes around the corner (preceded by her bust) and gives you a look.

"What's her problem? She see your dick or something?" Rose laughs and punches you on the arm as you pass her in pursuit of the girls, a friendly expression that nearly removes your arm. Hurrying on, you see that Mei, ever eager, has already set up both her homework and Sunny's notes on the desk in her room. Mei's taken her seat at the desk, going over her friends notes while Sunny sits on the nearby bed. Her already crimson blush spreads to the rest of her face as she sees you follow her into the room, and you feel like you've messed around for long enough.

"Uh, John, h-how are you todAAH!" Without missing a beat, you push her down onto her back and get on your hands and knees over the top of her. You reach down to Sunny's crotch, thinking to get her ready for your entry, only to find that she's unbelievably wet already. For a moment, the only sounds in the room are Mei's pen scratching away at her work and Sunny's heavy breathing. Did she always think about these kinds of things, or only in this world? You did contemplate asking her out that one time ... but now you can skip right to the fun part. Pressing the tip of your cock against her sopping wet slit, you feel a shiver run up Sunny's entire body.

"Oh gosh! You're going to ... I'm gonna ... we're ... !" Deciding to put the girl out of her misery, you thrust inside, the sheer amount of lubrication allowing your dick to slide all the way in without a hitch. You look down, slightly surprised.

"Sunny, you ... aren't a virgin?" You didn't think her face could get any more red, but it does.

"I masturbate every night with a dildo, thinking about someone just grabbing me and ... and f-fucking me silly and now you're doing it and you're the first boy who's ever b-been inside ... inside me!" Without even a second thought, Sunny blathers off her entire sexual history, continuing to ramble, explaining how she's been aching for this exact moment, how she thought it would never come, about how weird and horrible she must look right now. All you can think about is that she's the first girl you've fucked since this crazy change happened that hasn't needed you to trick her into it somehow. That, and the fact that her size makes her perfect for, well, grabbing and fucking.

Gripping her by the hips, you pump inside of her in the missionary position, her legs spread and locked behind your back. However, in a moment of inspiration you realise you could have so much more. In a fluid motion you lift her up and roll onto your back, placing her cowgirl style on your lap. Sun-Hee may not be as skinny as your half-sister, but she's still quite the small lady, barely older than Mei. Holding her tight to your chest, you lift her up and down with your arms while thrusting from below, her arms wrapping around your neck and breasts squishing into your body. She's warm, soft and light, hot breath collecting on your chest as she pants and gasps under your efforts.

"Hey, Sunny?" Mei looks over, as though her brother wasn't desperately fucking her best friend a foot away from her, "I don't quite get what you wrote here. Could you explain it?"

"Ah, th-that, ahh, let me, ah! Just-- ah! Just get over ... " Sunny struggles in your arms, mostly against herself, as she pries her grip off of you and tries to turn to see what your sister is talking about. Helping her out, you spin to the side and lift her up, allowing her to place her hands against the desk as you grip her thighs. Suspended part-way off the ground, her legs locking themselves back behind you again, you fuck her vigorously in this position as she squeaks out the explanation to your sister's problem. The way she's acting, enjoying sex where everyone else has been mostly neutral on the matter, gives you a bit of an idea.

"Sunny, I was just wondering," you smirk, driving your cock in and out of her, "Do you mind if I get you pregnant? It's just that I'm about to cum and I'd really like to shoot it all inside you."

"P-Pregnant! I suppose, ah, it can't be, ah, helped! I-If you, ungh, wanted to fill my womb u-uup! with your seed! It c-couldn't-- Oh! Mm! Couldn't be helped! I can't stop youuuu~ ohh ... can't stop you if you, mngh! shot your c-cum right into me-- Ah! and kn-knocked me u-u-uppp!" Now you've done it. Sunny continues - from the sounds of it, **** to receive your seed. Always eager to please, you grab her by the hips and press your dick as far inside as it'll go, painting her insides white with your hot, sticky stuff. Sunny's insides contract and squeeze you as she orgasms too, and you hear Mei snap at her to stay focused even as she lets out a lust-filled moan.

Basking in the afterglow, you gently lower her feet to the ground and pull out of her, cum dripping out of her pussy. A bit physically exhausted, you drop yourself onto Mei's bed, lying back. You feel your length go soft for all of about five seconds before someone licks it. Looking down, Sunny is cleaning you off with her tongue. She sees your confused look and blathers out, "I-I was j-just thinking that you would, you know, probably just stick it in my mouth a-anyway to clean off your hot, tasty, beautiful ... your cum! So I thought, um," Sunny struggles for a moment, slips your cock in her mouth and sucks it clean, then finishes her sentence, "I would just do it for you, s-save you the trouble. Because it can't be helped. Mhm." She swallows and you watch wide-eyed as she tries to hide a smile - was she always this lewd?

Tapping her nails impatiently on the desk, your sister looks over at both of you - your cock hard again, Sunny desperately thinking of some excuse to keep touching it.

"Could you guys, like, fuck somewhere else?"