(Aaah... What on earth am I doing, this is so indecent...!)
Leaning close to Rest as she taught him, Viola Rosemary squirmed internally.
If it were permitted, she would have rolled around on the floor from sheer embarrassment.
To all appearances, Viola was pressing her chest against him with perfect composure, but in truth she was anything but at ease.
It was nothing more than her rivalry with her twin sister Primula that drove her to desperately suppress her shame.
(Ugh... Why is Primula so unfazed about this... Pressing herself so close to a boy our age, and wearing something incredibly scandalous on top of that...!)
What Viola was wearing was a yellow negligee.
It was something she used as loungewear, so it was not particularly risqué in and of itself.
However, the cleavage that had recently grown noticeable was plainly visible, and the fabric was thin.
It would have been one thing around family or other women, but it was certainly not something she should have been wearing in front of a boy her own age.
(I never intended to wear something like this, but it's all because Primula was wearing one...)
Starting today, Viola had taken on the task of teaching Rest, but she had never planned to do so in a negligee.
She had intended to wear her usual casual dress, but her sister Primula had come out in a light blue negligee.
At her sister's audacity, Viola had flushed red, and Primula had flashed her a triumphant smile.
Fueled by her competitive spirit, Viola had immediately changed into a negligee she had purchased in a different color.
"Lord Rest, if you read this reference book here, this problem becomes much easier to understand?"
"Um... is this right?"
"Excellent! Wonderful!"
As soon as Rest solved the problem, Primula praised him and threw her arms around him.
Viola immediately stoked her competitive fire and pressed her body against him from the other side.
"You're amazing, Rest! Keep it up!"
(W-Well, first of all… Primula is cheating! She's usually so quiet, always hiding behind me… So why is she being so forward with Rest!?)
To Viola, Primula was her adorable little sister.
The light of her life, her other half — someone she'd give her very soul to protect. She was a existence equal to her own heart.
This was the sister she was supposed to be protecting… and now here she stood, a towering rival competing for the same man.
(W-Has she been growing without me even knowing? Or is it just because Rest is special? Even her chest has grown so much… At this rate, he's going to be taken away from me!)
They were the Rosemary twins — virtually identical in every way except hair and eye color, and temperament — yet somehow Primula's chest was slightly larger. It was the one difference, and it baffled Viola to no end.
Until now, Viola had never given it a second thought, but now it was bothering her in the most irritating way.
It felt like she was losing out on a weapon unique to women, and that only drove her frustration higher.
"Oh, then how about this, big sis! Instead of a reward, why don't I give you a 'punishment' instead?"
When Rest made a careless mistake on a simple problem, Primula made that proposal.
(P-Punishment? W-Wait… Primula, what are you talking about!? What!?)
"That's perfect! Primula, what a great idea!"
While panicking inside, Viola said the exact opposite of what she was feeling.
When she looked at Primula — her eyes glistening with an allure that had no business on a fifteen-year-old's face — there was no backing out of this.
"Alright then, punishment. Here I go…!"
"Lord Rest, please brace yourself…!"
(W-Wait… I'm doing this to a man who isn't even my husband or boyfriend… HyaAAAAAAAHHH!?)
Viola followed her twin sister's lead and reached out her hand, carrying out the punishment on Rest.
In truth, Viola was panicking like mad, so dizzy she felt she might collapse at any moment—yet even so, she traced her fingers along the body of the man she longed for.