The Hotel.
By the time Rin returned with the gear from home, Juju had finished her business and taken another shower. She didn't want even a hint of a bad smell to reach Rin's nose.
To avoid getting her uniform or lingerie dirty, Juju was now wearing only a bathrobe. Sitting on the sofa with her arms crossed, she stared at the toys Rin had brought.
The toys looked fairly standard... at least more normal than Moeha's. The lack of bizarre designs made Juju breathe a sigh of relief.
What made her uneasy, however, was the pack of adult diapers Rin had brought along.
"1, 2, 3, 4... based on my earlier 'exam' and your current size, let's start with the smallest one."
Rin picked up a toy slightly thicker than his finger, covered in small, soft ridges, and handed it to Juju. Juju knew exactly what to do with it.
This was only the smallest. The largest one was roughly the same girth as Rin himself.
Looking at the thickest plug, Juju swallowed hard.
There really is a need for development. If he just went in like that... I'd break. I'd definitely break.
Better to start small.
With that thought, Juju stole a glance at Rin. He didn't say a word, just watched her with a smile, winking whenever their eyes met.
Facing that mischievous look, Juju bit her lip. If I go to the bathroom, he'll just say I'm going to hurt myself and insist I do it in front of him.
And... it really is easy to get hurt.
For Shinju's sake, I don't want to split open...
Having simplified her internal monologue, Juju slid off the bathrobe, covering her small frame as she turned her back to Rin, offering him her petite rear.
Following the scenes in her mind, she licked the plug all over like a popsicle to provide lubrication, then assumed a squat with her legs wide. She pressed the tip of the toy against her rear and took several deep breaths to relax her muscles.
"Mmph!!!"
With a surge of effort from her arm the moment her body relaxed, more than half of the slender toy was buried inside her. A small section remained visible between her cheeks, looking like a tiny tail.
"How is it? What do you feel?"
"Mmm..." Juju stood up, clamped her cheeks, and took a few steps. "I thought it would hurt, but actually... it's just a weird sense of 'fullness.' No real pain."
It felt like needing to go to the bathroom and stopping halfway.
"It seems you have a real talent for this, Juju..."
Halfway through his sentence, Rin reached out and lightly flicked her "little tail," making her let out a startled shriek. To be honest, Juju was a bit disappointed... this was nothing compared to the sensation in the parking lot.
But... How can he hold back?
Watching me do something this lewd, and he can just sit there without touching me? He hasn't even pitched a tent! If it were Shinju, he'd have pounced on her by now, wouldn't he?
Shinju was always envious of her, but Juju was envious of Shinju, too. Beyond "Magical Girls," she wanted to cosplay other roles, but her body only fit petite, childish characters.
Because of this body, she was treated like a child every time she went out... The more she thought, the more aggrieved she felt, her eyes welling up with tears.
"Maybe we should—"
"SHUT UP! SHUT UP! SHUT UP!"
Rin saw she was about to cry and tried to comfort her, but Juju cut him off instantly.
"Hurry up! Keep going!" Juju glared at Rin with watery eyes, her voice cracking. "Weren't you trying to tease me? Just keep going!"
She was both aggrieved and stubborn.
She wasn't crying because of the training... after a bit of thought, Rin realized the truth.
The younger sister was insecure about her height; the older sister was insecure about her lack of growth. They really were sisters—even their insecurities mirrored each other.
In a situation like this, standard comfort would backfire. He had to use ridicule.
So...
"Pfft hahahaha!!!!"
Rin looked at her stubborn, teary face and burst into laughter. Juju's glare became even more murderous. Rin ignored her "hissing" and pulled her forcefully into his arms.
He used both hands to ruthlessly mess up her hair and squeeze her cheeks as if she were a precious porcelain doll.
"Are you jealous because I'm not excited? Well, it makes sense. Your chest is flat and your butt is tiny; getting excited for you would be the real 'abnormal' behavior."
"..."
Hearing Rin say it so bluntly made Juju's nose sting even more. Rin brought his lips to her ear and whispered softly.
"However... it seems I am indeed a bit abnormal."
"GUH-WOOO!!!!!"
The moment the words fell, Rin gripped her face, turned her toward him, and captured her lips in a kiss. After a token struggle, Juju closed her eyes.
Rin let go of her face. One hand roamed her body, bullying the small mounds that were the polar opposite of Shinju's, while the other hand massaged her lower abdomen, pressing down on her "baby room."
A short while into the kiss, Juju felt something hot and hard pressing against her back. Breaking the kiss, she opened her eyes in his arms.
After a shy glance at Rin, her tsundere nature took over. She covered her chest and her dripping lower abdomen with her hands.
"Pervert... a pervert who can actually get excited for someone like me."
She cursed him, but the corners of her mouth were twitching with a smile she couldn't hide. Shinju had her insecurities, but Juju had hers, too.
"Since you made me hard, you're responsible for fixing it."
Rin sat back on the sofa. After one last tsundere insult, Juju knelt before him and unzipped his pants. She was in the exact same position Shinju had been in earlier.
First the developed younger sister, now the petite older sister.
Juju leaned down and tried to use her flat chest to sandwich him... She couldn't even reach around him!
No matter how hard she squeezed her arms together, there was no "sandwich" to speak of. Unlike the softness he felt earlier, all Rin felt now was the sharp contact of her ribs.
"Pfft..." Watching Juju's desperate struggle, Rin couldn't hold back his laughter. "Stop squeezing. No matter how hard you try, you aren't making a valley. It feels more like... a file."
"A... A FILE!?" Juju's lip twitched. "SHUT UP! SHUT UP!!"
Mortified and furious, Juju gave up on being gentle. She pressed her chest against him as hard as she could, letting him grind against her sternum while she glared at him with murderous intent.
"So what if I'm flat!? A file it is!! I'll file you to death! I'll file you to death! I'll file you to death right now!! I'm using my chest to file you into dust!!! If you dare go soft or fail to come, I'll kill you and then I'll kill myself! AAAAAAAAAAAHHHH!!!!!"