The entire next day, Rita was hovering around Rin.
From her petite, tender jade feet to her smooth, hairless calves, she paraded around him all day without attracting much attention.
Rita was genuinely offended now!
Is my charm really that pathetic!? Not even a single glance!?
Rin sat in front of his computer all day rushing his manuscript.
With the weekends full of chaos, he had to finish his work during the quiet weekdays.
Unless Rita stripped buck-naked, Rin wasn't going to look at her... women only slowed down his drawing speed!
In the late afternoon, after a full day of drawing, Rin stretched his limbs.
"Ugh... Rita, I'm heading out. Read whatever manga you want."
"Going out again?" Rita frowned, closing her book and rolling off the bed.
"What exactly do you do when you go out? I asked Nanami and Mashiro, but they won't tell me."
"Mmm... gathering materials for my manga?" Rin teased with a wicked grin.
"If you start drawing manga too, I'll take you along for 'research'."
"Che~ I'm not drawing." Rita waved him off and flopped back onto the bed. "I just want to read~"
"I'm off then. I won't be back for dinner."
The first thing Rin did after leaving was head straight to the hotel.
Sajuna had been unable to touch herself for a week due to the chastity belt and was starving for relief.
Not long after he arrived, Sajuna, still in her school uniform, swiped her keycard and burst into the room.
"Are you that hungry? You ran here right after class?" Rin teased, checking the time. "It seems you couldn't wait another second."
"I... I..." Caught red-handed, Sajuna's face turned beet-red. "I did this for Shinju's sake! What if I arrived late and she got here before me?"
Rin almost burst out laughing. It was obvious Sajuna had bolted here the moment the bell rang, likely taking a taxi.
"Hurry up and take this chastity belt off. I need to shower so Shinju doesn't smell anything strange on me."
"I see. Sajuna really is a good sister, always thinking of her sibling." Rin suppressed a laugh, acting serious.
"But maybe a 'strange' scent would be more appropriate."
"HAH!?"
"A bit of a 'stinky' smell would help Shinju realize that you're just a normal girl too."
As he spoke, Rin pulled out his phone and unlocked the belt. The moment Sajuna let out a breath of relief, Rin slid his hand beneath her skirt.
It was silky, warm, wet, and slightly sticky.
Rin had barely touched her with his fingertips before the petite girl was leaning heavily against his arm.
"Pfft... excited already? Did you start getting hot at school, or was it on the way here?" Rin whispered amorously, nipping her cute earlobe.
"I can check the system logs for the exact time, you know. If you lie, I'm locking you back up until next week."
"Ugh... pervert." Sajuna buried her face in Rin's shoulder and gave it a small bite.
"It... it was at home. I got excited while I was still at home."
"At home...?"
"AAAAHHH PERVERT! You have no consideration for a girl's feelings!"
With her face still buried in his shoulder, Sajuna screamed in a fit of "broken" frustration.
"I've been excited since we made the appointment yesterday after school! I've been anticipating this and vibrating with arousal since last night! Pervert! Are you happy now!?"
"That's more like it." Satisfied with his teasing, Rin gently pushed her away.
"Go shower. No self-maintenance allowed in the bath."
"I know!" After delivering a sharp stomp to Rin's toe, Sajuna grabbed a towel and ran to the bathroom.
She didn't dawdle. She gave her key areas a quick rinse and used a douche to ensure everything was pristine before bolting out.
She didn't dare spend too much time cleaning the inside... she was afraid she'd climax just from the water pressure.
Even so, she was already on the edge. After she dried her hair, Rin placed the blindfold over her eyes.
"Shinju will be here soon. Just stick your ass up and wait." Rin gave her small rear a light pat.
"I heard from Orie that your magical girl costumes are ready?"
"Mmm, they're done. They fit perfectly. I talked with Marin-chan; we're planning to find a place for a photoshoot first..."
As she spoke, she couldn't help but wiggle her rear. The two "little mouths" below seemed to be breathing, beckoning for Rin.
"Why isn't Shinju here yet? Ask her where she is."
"What's the point? She isn't a real magical girl; she can't teleport."
In her arched position, even the light breeze from the air conditioner felt like an electric tingle, making her drool.
"Uu..."
Rin deliberately avoided touching her. In her current state, he felt a single hard slap would be enough to make her squirt.
"I know you're in a hurry, but take it easy. When Shinju gets here, she's going to give you a heavy slap, and you're going to spray all over her."
"When you squirt just from a spanking, she'll definitely realize what a perverted sister you are."
"..." Sajuna's words died in her throat... What kind of sister wants her sibling to think she's a pervert!?
"Where are you planning to do the shoot? Renting a studio?" Rin's fingernails traced the edge of her buttcheeks, never quite making contact.
The "now you feel it, now you don't" sensation was driving Sajuna insane. But after enduring for a week, she didn't want to waste the buildup now.
"Studios are too expensive. We'll find an abandoned building if we can. Otherwise, we'll just set up at home. Maybe we can borrow Kaguya's villa."
Sajuna tried to focus on non-erotic topics to distract herself, but Rin could still see threads of saliva escaping her lips.
Both sisters were high schoolers. They worked part-time, but it wasn't much money. Since they had high standards and custom-made their outfits, they rarely had funds left for high-end locations.
But the background was secondary. As long as the costume was exquisite and the cosplayer was cute, they'd attract fans.
Their cosplay had always been limited to online photos; they had never worn their gear to a live convention. This would be their first time.
"Don't go to abandoned buildings anymore. They're full of homeless people or gangs doing shady deals. You're so small; if you get injected with a drug that shrinks your body further, it's over."
"???"
Sajuna understood the danger of gangs... but what the hell was a "shrinking drug"?
The two chatted idly, with Rin occasionally checking her state to keep her arousal peaked.
Her most delicate spot between her legs was practically screaming for attention, but the only thing touching it was the faint airflow of the room.
Rin really wanted to give it a sharp flick, but he held back.
With Sajuna's current sensitivity, a flick would probably be agonizing. Yet, she looked like she was dying for him to do it... Unable to even clamp her legs, she just dripped helplessly.
The blindfold only heightened her other senses.
BZZZT. BZZZT.
The vibration of Rin's phone made Sajuna hold her breath.
"It's Shinju."
Phew...
Sajuna let out a long breath. Finally... why did she take so long!?
In truth, Shinju hadn't been slow. Sajuna was just too fast. She'd finished her shower and douching before they'd even talked for ten minutes.
Shinju: [Big Brother, can I come up now?]
Rin Ito: [Come on up. Your sister is about to lose her mind.]
Rin Ito: [I've put earplugs in for her. Just knock.]
"Put these earplugs in. Act like you can't hear the door." Rin expressionlessly fitted the plugs into Sajuna's ears.
The moment they were in, Sajuna felt the world go silent. It was so quiet her ears were ringing... What brand are these? They're incredible.
I'll have to ask him for some later.
Rin didn't have extras. These weren't normal earplugs; they were system items that Kaede had been tricked into buying.
Once in, she wouldn't even hear an orgy happening right next to her.
Rin claimed it was for "realism," but his motives were simpler.
Sight, sound, smell, taste, touch. Now, sight and sound were gone.
With nothing in her mouth and no incense in the room, her taste and smell were weakened too.
This forced her brain to hyper-focus on touch. Every molecule of air from the AC felt like a hand stroking her skin.
Wow... the soundproofing is too good. I can't even tell if the door opened. Waiting to be used, Sajuna's heart hammered against her ribs, her face flushed as she rhythmically wiggled her petite rear as if inviting him.
She had no idea Shinju was already in the room.
"You can speak freely now. I tested the plugs; she can't hear a thing. You could whisper in her ear and she wouldn't know."
"Phew..." Shinju let out a long breath of relief. "Sister's ass... it's so depraved. It looks like it's breathing. Should I... should I shower first?"
As the sound of the shower started, Rin removed Sajuna's earplugs and spoke in a low voice.
"I know you're in a hurry, but take a breath. Shinju is in the shower."
"I..." Sajuna didn't know what to say... This bastard is deliberately edging me with 'placement play' just to see me beg for it!
She was right.
While Shinju showered, Rin left Sajuna on the sofa and pulled some new "gadgets" from his bag—items Kaede had been talked into buying by the system daughter.
They functioned like standard vibes but connected to an app that allowed remote control. By the time Shinju was finished and prepped, Rin had finished the setup.
Sajuna's saliva was now dripping down her thighs and onto the sofa cushions. Rin, still unhurried, took his time blow-drying Shinju's hair.
"Sajuna really is a pervert. Just arching her back here has made her a literal fountain."
"Mmm... it's true. Sister's body is so sensitive..." Shinju watched with a look of pure envy. "I... I heard boys like sensitive girls."
"True, but there's a limit." Rin knew Kaede was watching through the camera system; these words were for her.
"If she's too sensitive, she'll squirt the moment I get inside, and we won't be able to keep going."
"Eh... I guess that makes sense." Shinju nodded. "If... if Sister is too sensitive to satisfy Big Brother, I can take her place."
"It's not that bad. Sajuna is sensitive, but not broken. Kaede's sensitivity is the real exaggeration... normally she's fine, but during sex, she squirts the second I enter. She can barely last two movements."
Rin suppressed a laugh, wishing he could see Kaede's face right now.
"Sigh... I love her, but Kaede is just too sensitive." Rin grinned. "Anyway, Shinju, want to make a bet?"
"A bet?" Shinju tilted her head in confusion.
"Give her one hard slap right here. I bet she squirts the moment your hand hits her."
"Is that... even possible?" Looking at her sister dripping just from being ignored, Shinju wasn't sure. But she chose to believe in her sister! "I... I don't think so. What's the stakes?"
"If you lose, you have to kiss me. If I lose, I have to kiss you."
"Pfft..." Shinju couldn't help but laugh. "So it's a kiss either way? Deal."
Shinju swallowed and raised her hand high. And then...
"HYAH!" With a sharp cry, Shinju's palm slammed into Sajuna's rear.
SLAP!
The sound was sharp and clear. And then...
"EEEEE-IIIIIIII!!!!!"
With her hearing blocked again, Sajuna didn't know if it was Rin or Shinju. Already at her limit, the sudden impact caused her to erupt. A heavy spray of "warm rain" drenched Shinju's front, even splashing onto her face.
Sajuna didn't care who hit her anymore... after a week of repression, the release was heavenly.
"Sister... is so sensitive."
"It's not sensitivity; it's depravity. Try hitting her a few more times."
"Mmm... HYAH!"
Another slap. If not for the first one giving her a moment to brace, she would have screamed "OH-HO-HO-HO." A series of slaps followed, leaving the freshly showered Shinju soaked in her sister's juices.
Shinju didn't mind. She didn't think her sister was "dirty."
"Look, Sajuna's ears look like they're on fire." Rin pinched her ear and pretended to adjust the plug, making it "slip."
In the app, he simply turned the noise cancellation down so she could hear their voices.
"Sajuna's body really is lewd. Much more depraved than yours, Shinju."
"Mmm... it's true. It's very... wanton."
"!!!!" Sajuna's small frame shuddered. To be described like that by her own sister... I... I'm a failure of an elder sister.
Uu... I'm so sorry for having such a horny body!
Sajuna apologized in her head while fighting to keep her "I can't hear you" act alive.
"I actually have a tool that lets us see exactly what's happening inside your sister. This one."
Rin handed a device that looked like an electric toothbrush to Shinju. The handle was familiar, but the tip was very slender and equipped with a tiny LED lens.
"What is this?" Shinju inspected the tool.
The blindfolded Sajuna was also dying of curiosity.
Yes! What is it!?
She was frantic. She could hear them now, but she had no idea what kind of toy was about to be used on her.
"I'll show you."
Rin clicked the switch. The tiny LED flared to life. And then... nothing.
"It's just a light?" Shinju looked it over, unable to find the secret. If Shinju couldn't see it, Sajuna definitely couldn't.
"Hehe, look here."
Rin pointed the lens at Shinju's face and showed her his phone screen. Her face appeared in high definition.
"This..." Shinju instinctively covered her mouth and looked at Sajuna. "Big Brother, you mean this thing is used for..."
Shinju made a circle with one hand and poked it with her index finger.
"Exactly. Want to try it first, or should we go straight to Sajuna?"
"L-Let's just use it on Sister. This is... way too embarrassing for me."
AAAAHHH WHAT THE HELL ARE THEY GOING TO DO TO ME!?
Sajuna screamed internally. Her heart was pounding and itchy, as if a million Rin Itos were crawling all over it!