Chapter 1 : A New Day Begins With Exploitation

Although he wasn’t sure what a normal high school boy’s weekend morning should look like, Arisugawa Yuu was fairly certain it wasn’t this.

A heavy pressure bore down on the thin blanket—
—specifically, the weight of a girl.

Sitting atop him in a duck-like squat was a silver-haired beauty who spoke with clear irritation,
“Arisugawa Yuu, how much longer are you planning to sleep?”

Her voice was cool and melodious, like the babble of a mountain stream—
—ethereal and distant, almost otherworldly.

Yuu opened his eyes and looked toward the voice.

The girl sitting on him had long, moonlight-like silvery hair that cascaded down her back.
She was none other than his so-called “sister”—Kanzuki Kanon.

“’So-called’” because the two weren’t actually related by blood.
They’d become siblings purely due to a twist of fate.

Her oval face was delicate and coldly beautiful.
A high-bridged nose, soft pink lips, pearl-like teeth—
—eyes of a soft, watery blue that seemed to ripple with smoke and mist.
Her flawless, snow-white skin looked as if it were carved from ice and silk.
More than just pale, it shimmered with a healthy, youthful luster.

Just from the face alone, she was a textbook definition of a perfect beauty.

But what truly left people breathless was not just her face—
—it was her figure.

Her chest was tightly bound in a white shirt, bulging prominently as though daring the fabric to tear apart under strain.
Despite the fullness of her bust, her waist was impossibly narrow, easily graspable with a single hand.
Her stomach, visible where the hem of her shirt curled up slightly, was flat and snow-pale, her navel delicately shaped.
It was so perfect it left one unsure of where to look.

And then—
—there were her legs.

Long, dazzling legs wrapped in mismatched thigh-high socks—one black, one white—peeking out from under her short, smoky-gray pleated skirt.

Yuu swore he’d never seen a girl with legs that long in his entire life.
And that length had a cost—
The skirt that would’ve looked normal on most girls looked dangerously short on Kanon, exposing vast swaths of glowing, flawless thigh.

She noticed his gaze.

Smirking slightly, she lifted her skirt just a bit and asked with mocking sweetness,
“Like what you see?”

Yuu quickly averted his eyes and ignored her provocation.
“Kanon, let me sleep a bit longer.”

The next second—
A delicate, white foot wrapped in sheer white stockings stepped on his face.

She dropped the skirt and crossed her arms, tone growing colder and more imperial.
“You even know what time it is?”

“It’s the weekend…”

Yuu turned his head slightly to the side.
He didn’t know if all girls’ feet were fragrant—
—but his sister’s certainly were.

A faint, refreshing scent drifted into his nostrils, clearing his sleepy head.
Still, Yuu wasn’t a pervert. He wasn’t turned on by having a girl step on his face—
—even if that girl happened to be his overly assertive little sister.

He also knew better than to try pushing her foot away. That would only give her ammo to label him a creep.
So instead, he endured in silence.

Unfortunately, his passive resistance didn’t last.
Kanon simply shifted her foot back onto his face and sneered,
“Just because it’s the weekend doesn’t mean you get to sleep in. Get up and make me breakfast.”

Yuu sighed, defeated.
Warm breath brushed against her smooth, silky foot.

“Kanon, there’s leftovers from last night in the fridge. Just heat them up. I’ll cook something fresh later.”

She gave his lips a small kick with her toes, clearly displeased.
“You want me to eat leftovers?”

That did it. Yuu finally pushed back, holding her foot in place with his hand.
“It’s only from last night! No one’s eaten it yet.”

She tried to pull away but couldn’t.
Flustered, her snow-pale cheeks tinged with pink.
Turning her head to hide the color, she muttered,
“No. I want something freshly made.”

Yuu missed the blush entirely.
“Throwing it out would be wasteful. Our food expenses are already too high this month. We should try to save.”

She turned back, glaring at him with piercing blue eyes.
“Are you saying I eat too much?”

“I didn’t mean it like that. I just think we should be more budget-conscious.”

Kanon chuckled coldly, her beauty suddenly tinged with a spring-like vitality.
But it didn’t last.

Her expression turned icy once more.
“Arisugawa Yuu, do I look like someone who’s short on cash?”

“I know you make good money modeling for magazines and such, but even so—saving money is important. Earning isn’t easy.”

She gave him a disdainful smile.
“My dear ‘brother’… Since when did you become so considerate? If you don’t want to get up, just say it.”

Though she saw through him, Yuu wouldn’t admit it.
“I really am being considerate. Honest.”

Feigning contemplation, she tapped her chin with one dainty hand.
“Is that so?”

Seeing an opening, Yuu quickly followed up,
“Exactly! I’m just being thoughtful.”

She applauded lightly, her smile enigmatic.
“Well, well… Brother sure is good to me, always thinking about my well-being.”

Something felt off, but Yuu played along.
“Of course. I’m your big brother, after all.”

“—So this is what my dear brother does for his sweet little sister?”

She pointed to the trash can in the corner.

Inside—several crumpled tissues. Snow-white and suspiciously numerous.

Ah. Crap.

Panicking, Yuu quickly explained,
“I caught a cold yesterday. Had a runny nose.”

She gave him a sideways look, expression unreadable.
“Really? Then why do you seem fine now?”

“Maybe because I slept it off?”

That was the truth.
He’d been sick yesterday—miraculously recovered after a nap.

But sometimes, truth sounds more like lies.

Especially right now.

“You expect me to believe that, my dearest brother?”

She looked at him with naked contempt.

And she had a reason.
On his very first day in this world, she had ordered him to wash her worn socks.
Instead of washing them immediately, he’d—out of curiosity and scientific inquiry—brought them back to his room for the night.
Nothing happened. He swore. He was just curious.

But from her point of view… he was a textbook pervert.

Damn it, Yuu thought. I’ve been framed.

He sighed,
“Kanon, I’m telling the truth. Even about that time.”

She waved a hand dismissively, her tone final.
“Enough. No more nonsense. Get up and make me breakfast.”

“…Aren’t you mad?” Yuu asked reflexively.
“I mean, if I did do something pervy… wouldn’t you be angry?”

“Would you not have done it if I’d been mad?”

Her smirk deepened.

“I really didn’t—”

“Stop wasting time and get up.”

It was no use. She didn’t believe a word.

Yuu gave up.
“…Fine. At least step out so I can change.”

“My dear brother, I’ve seen your body before. What are you so shy about?”

Still, she got up and walked to the door.
Yuu wisely kept silent, not wanting to provoke her.

But before she left—
She paused at the door.

Then, in one fluid motion, she bent down, peeled off her black and white thigh-high socks, revealing her snowy, elegant legs—
—and tossed them across the room.

They landed squarely on Yuu’s face.

Before he could react, her voice rang out sweetly,
“Since you’re being so obedient, I’ll give you a little reward. These socks are yours. Use them while they’re still warm. You’ve got thirty minutes.”

Removing the still-warm socks from his face, Yuu exclaimed,
“What the hell?! Why are you making me sound like a pervert?”

She ignored his protest and added,
“FYI, I wore those since last night. They’re soaked in my scent. You should be thrilled.”

Holding his head, Yuu groaned,
“Are you even listening to yourself? Who would get excited over something like that?”

To which she casually replied—

“Oh? So socks alone aren’t enough for you?
Don’t tell me… you want my underwear too?”

“I absolutely do not!”

Yuu’s face darkened.

“Then stop talking and use the socks while they’re still fresh.”

With that, she walked out without looking back.

Yuu was left alone, staring at the warm black-and-white thigh-highs.

After a long silence, he muttered,

“Sisters… aren’t cute.
They’re not gentle.
All that stuff about sweet, loving little sisters?
Lies. Pure 2D fiction.
If anyone dares say little sisters are cute again, I’m punching their dog.”

With a final sigh, he carefully placed the socks on the nightstand and got out of bed.

He walked over to the window and pushed it open.

Outside—
The morning sun poured over a sea of cherry blossoms swaying in the breeze.
A lone crow crossed the sky, its caw loud and shrill.
Far above, a contrail split the blue sky in two.

It was early April—
Cherry blossom season.

The seventh day since Arisugawa Yuu crossed into this world.