Before the Semester Starts

"Let's set some rules."

"Huh?? What rules??"

"Haaah…! Oppa, you got a text, didn't you…? Nngh~♡…"

I was toying with my little sister's bare breasts, rolling her stiff nipples between my fingers and tugging them this way and that. She wasn't wearing a thing up top.

"Ahh… you mean the one this morning about freshman orientation?"

Orientation. That was the drinking-and-mingling thing, right? The usual get-to-know-you mixer.

"You going?"

"Hnn… nngh…!! …I have to… go…!"

Since when did she like that kind of thing? I was pretty sure she hated talking to people for any length of time. Maybe she was trying to reinvent herself now that she was a university student.

I kept kneading her chest in my palm like dough, squeezing and pulling in a slow, idle rhythm as I thought it over.

"Mm… I don't really feel like it. I just wanna take it easy until classes start."

"Haaang~♡, cut the… crap… and come… ah…!! Hnnn…"

I stopped moving for a second, curious.

"Aahh… I've got stuff to do with you… so you have to come…"

"What, that rule thing you just mentioned?"

She nodded.

Then she looked up at me all of a sudden, her face going red, and said,

"Sooo… when we see each other outside, I want you to treat me like we've never met."

What was this? Was I so embarrassing she didn't even want to acknowledge me? Some new kind of harassment?

She must have read it on my face, because she hurried to correct herself.

"No…! We're university students now… and if I want us to walk around like a couple… we have to build it up from the start… I want to stick to you the whole time… so from orientation on, act like you've never seen me before… okay…?"

What a production. She really put her heart into this nonsense.

I nodded.

"Hee! I love you so much, Oppa~♡"

She threw her arms around me.

Then she yanked my pants and underwear down, stared at my cock standing stiff at attention, and wrapped her hand around the shaft. She pressed down and climbed on like a witch mounting a broomstick, settling herself right on top of the column of it.

For the record, all she had ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠on was a pair of panties. Her pussy was already soaked through, leaking steadily inside the fabric, and as she rocked her hips back and forth the mess smeared all over me. In no time my cock was slick with her juices.

"Aungh…! Oppa's… so hot… I wanna put it in already…♡ …haah!!"

A wet little gush spilled out of her. She'd gotten herself off just from grinding.

"You know you still can't put it in."

"Hiiing… I know, but I still… I wanna put it in and have sex with you already…"

After the last time we'd gone at it too hard, I'd taken her to the hospital. They found bruising deep inside her vagina and put her on a three-week no-insertion order, plus a prescription. For the first week, they said, I wasn't even supposed to touch her down there.

About two weeks had passed since then.

Her chest had gotten bigger, too. Last I'd heard she was a D-cup; now she was saying E-cup bras fit her perfectly, and she'd ordered a whole pile of them from a lingerie shop.

Since I couldn't touch her pussy, I'd been slipping my hand up under her shirt whenever I got bored around the house, playing with her tits and nipples. She'd been pretty startled at first, but she never once told me to stop. Two or three days later she was the one pressing closer whenever my hands found her… and these days she didn't even bother putting a top on at home. No bra, either.

I'd been tugging, pinching, biting, and sucking on her nipples every single day, rough enough that they stayed swollen. They'd grown to about the size of the first joint of my thumb.

The fact that her body was changing under my hands was strangely fascinating. Fun, even.

"O…ppaah…♡ hauu…! …Oppaah…!"

She was still trembling through the aftershocks on top of me.

I let her settle a little, then told her to do that.

"Haaaah…♡… again today…?"

"Hurry up and do it."

She climbed off my cock, crouched down, and pressed her face right up against the head, breathing a hot haaah~ over it before she started sucking the precum beading from the slit.

She made wet, greedy little sounds as she worked — sucking, popping off, diving back in. The head was too thick to fit properly in her mouth, so she made a ring with both hands and stroked the shaft from root to tip over and over, jerking me off while she sucked. I'd had her try this a few days ago and it had felt so good I'd been making her do it ever since.

The stimulation was so intense I felt like I could blow any second.

"Hhhk…!! I'm about to cum…!!"

"Chuuup…! Pwah…! Cum for me, Oppaa…! Anh."

She opened her mouth as wide as it would go. One hand kept pumping my shaft even faster, never stopping, while the other made a V with her fingers and stretched her lips wider still.

Then she stuck her tongue out long and looked me straight in the eye, showing me the sticky, spit-webbed tunnel of her throat.

It was so filthy it made my head spin.

"Guaah!! I'm cumming!"

My cock swelled, the head ballooning once — and then it burst right in front of her face.

Semen hit her like a faucet wrenched wide open, thick ropes slapping across her skin. Pulse after pulse, it just kept coming. She didn't close her eyes. She looked up at my face the whole time, smiling with her eyes, taking every last spurt.

The orgasm stretched past a full minute. When it finally started to ebb, the last of it left in my urethra streaked out with a wet little sound and landed in her open mouth.

By then her bangs and her face were buried under so much cum you could barely make out her features. Below her throat, more of it slid off her tits in heavy clumps, pooling on the floor. She looked like she'd taken a shower in the stuff.

A moment later she swept a hand down her face, gathered the semen in her palm, and sucked it straight off.

She opened her mouth to show me the load pooled on her tongue — then chewed a few times and swallowed it down.

She opened up again and stuck her tongue out long, as if she wanted me to see she'd swallowed every drop. Heat still rolled off the inside of her mouth in soft little puffs.

The sight of it got me going all over again. My cock gave a heavy twitch and started to rise.

"Hauu… Oppa's cock-juice… tastes so good…♡"

She was still savoring it when she noticed I was hard again.

"Haaaah… looks like the little guy still isn't satisfied…♡ …wanna do something even better…?"

"Hnn… we still can't do insertion."

She grinned.

"Hehe~♡ This is something else~!"

She stood up, stepped in close to where I was sitting, and —

Riiip.

— grabbed the collar of my shirt with both hands and yanked it wide, stretching the neck clean out.

Fuck. I'd liked that shirt.

Then she lifted the hem, shoved her head through, and crawled straight into my clothes. A second later her head popped out the collar right in front of my face.

She beamed.

"We're… completely stuck together like this…♡"

She was looking at me from less than an inch away, smiling. She smelled like cum, but she was being cute this time, so I figured I could live with it.

Then she twisted around so all I could see was the back of her head. She stripped off her panties, pinned my cock against my body with one hand, and pressed her ass flush against me. She tipped her head down a little and started sliding the shaft up and down the cleft of her pussy and the crack of her ass.

My shirt was stretched taut, crushing her tits flat against me. She looked like she might topple forward, but the fabric was good enough to take her weight. I hooked one arm under her armpit and around her throat so she wouldn't ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠fall, and with my other hand I grabbed one of those tits straining against the tight shirt, matching the roll of her hips with my own.

"Heuk…! Khhk…! Kahh…!"

She started making choked little sounds — probably because I had her by the neck — and it looked enough like she was dying that I stopped and pulled her back against me.

"Heu… haaah… what is it… Oppa?"

"Turn around again."

She obeyed without a fuss.

I had her bend at the waist until she was down around my hips, then pulled my arms out of the shirt, tugged it down over her, and fed her arms through the sleeves instead. She'd already figured out what I was after. She pushed her tits together and squeezed in tight, trying to trap my cock between them.

The shaft was too thick for her to wrap all the way around, but the stretched shirt held everything in place so nothing could slip free. That was good enough.

She let a long string of spit fall from her tongue, smeared it messily over her tits and my cock, then looked up at me with that eager, smiling-eyed expression that said she was ready.

"Ahhh… it smells like cock…♡"

I laid her down and started snapping my hips, driving my cock through the valley of her chest. The slick, tight drag of it felt incredible.

"Huuut…! Hyaah…!!"

"Ahat…!! Oppa! Harder…! Shake it more… heu…♡"

With the girl pinned underneath me cheering me on, I put a little more force into it.

"Hyaaah… Oppa's cock… the smell… heu… such a huge… cock… huu… if you'd just… ram it in my pussy hole…♡"

She was mumbling something, but my cock was in the way and I couldn't see the look on her face.

I kept slamming away until I felt it building, then called down to her.

"Hhh… I'm gonna cum, so open your mouth…!"

The second I said it, both her hands went to her face.

"Ith open… hurry up and do ih…♡"

What?

I was right on the edge, but I was too curious not to look. I pulled my hips back and glanced down.

She had her fingers hooked in her mouth, stretching her lips so wide it almost sounded like something tearing. Spit ran down her chin. She was lying there waiting for my cum with her mouth wrenched open like that, a hot ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠little breath spilling out of her.

It was so filthy I almost lost it on the spot. My cock swelled, ready to blow — so I grabbed the back of her head and shoved it into that waiting mouth. She'd opened wide enough that I sank in about halfway. I looked into her eyes, which were staring up ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠at me all eager, and let go.

It erupted. Thick, pulsing surges, one after another. Her cheeks ballooned, and every time my cock kicked, semen came flooding back out of her mouth and her nose.

"Kuhek…!! Kehek…! Khhk… kahh…! Uwee…!!"

The eyes that had been watching me went slack and started rolling upward. Her face flushed red and her whole body jerked.

"Haaah… hh…"

I panted through the last of it, wringing out every drop before I pulled the head free of her mouth.

Her arms had already gone limp, flung up past her head. She was staring at the ceiling with unfocused eyes, mouth hanging open, cum running out of her nose. Every time her body twitched, another mouthful of it sloshed out of her.

"Agaah… agrh… a… gaaah… a oop…!!"

I glanced down at her belly, swollen with everything I'd pumped into her, and figured she might choke if I left it sitting there. So I planted my foot on her stomach and pressed down, slow and firm. That was what pulled those noises out of her.

Then I heard water.

I looked. She was still on her back, cum backing up out of her mouth, tears on her face — and she was pissing herself in a weak, helpless trickle.

"Heuungh…♡"

How the hell was I supposed to clean all this up…