"Nini, let me rub your back!"
My sister's excited voice came from behind, followed by the muffled sound of bare feet happily stepping on the water stains on the floor.
The sound of approaching footsteps was like a dull hammer hitting Nakano Mayu's heart, making his heart beat faster in an instant.
Nakano Mayu was originally scrubbing his hair, but he couldn't open his eyes temporarily because of the foam.
"Nanako, I'm not saying it's forbidden..."
"Nini, don't...don't turn your head. Even if Nini sees this, I...I will be shy..."
"Forehead..."
He was about to turn around when he suddenly froze.
What does sister mean by this sentence?
Could it be...
Although my sister might be joking, but if it really is...
The moment he froze, a soft little hand suddenly rested on his back, and there seemed to be slippery shower gel on it.
The feeling of ice-cold shower gel touching the skin on your back.
Let Nakano Mayu tremble slightly for a moment.
The coldness of the shower gel combined with the warm and soft touch of my sister's hand.
Let him instantly transform from a body of flesh and blood into a body of steel.
His whole body became stiff.
Stiff and hard...
"Nanako... Nanako, stop making trouble and get out quickly. I can wash it myself!"
"Nini, we haven't been together for a year... can't we deepen our relationship after a long time?"
"The Point Guard Is Here"
My sister's voice was not as clear and mellow as usual, but became a little soft and pitiful.
It's a bit like Quail-senpai's waxy feeling, but not as natural as Quail-senpai.
"Nanako, if you continue to make trouble, brother... brother will really get angry..."
"snort!"
The younger sister snorted softly and said with some anger:
"Nini hangs out with wild women outside all day long, but refuses to do some parent-child activities with her sister to strengthen the relationship between brother and sister? Then brother, please kick me out personally..."
"you!"
Nakano Mayu was choked for a moment, not knowing where to start his rebuttal.
Mainly if my sister is in the 'unarmored' state now, I can't turn around no matter what.
Unless he can keep his eyes closed and not touch her other delicate parts in this narrow bathroom, he can drive her out...
But if it was Quail Senior, he would still be sure, but although his sister's skills were a little weaker than his own, she couldn't be solved so easily.
So at this time, his sister seized the weakest opportunity and was in a dilemma.
"hiss--"
As his back was covered with the cold shower gel, he subconsciously took a breath of cold air and his voice became deeper:
"Nanako, I can do it myself, it's too... too cold..."
"Of course, this is the result of me keeping it in the refrigerator for a period of time. It's very comfortable, right Nini?"
"Um?"
Nakano Mayu was a little confused.
Can this thing still be played like this?
The most important thing is, where did my innocent and simple sister learn this strange knowledge?
"hiss..."
Soon, under his strategy of silence, non-cooperation and non-resistance, his back was covered in all directions by the slippery, cold shower gel.
What followed was a warm and playful 'girl idol', slowly singing and dancing from behind.
"Snapped!"
But unfortunately, the experience of 'girl idols' is obviously not as rich as that of 'male idols'.
Before he even got close to the forbidden area, he was caught by Nakano Mayu.
"But...it's okay Nanako, I can do the rest myself..."
Under the simultaneous attack of the cold shower gel and the warm girl idol, the boy's voice sounded a little trembling.
"It's okay, Nini~" Because he had his eyes closed all the time, he couldn't judge the position of his sister behind him.
He could only roughly feel from the source of the sound that his sister should be very close to him at this time.
Because when the girl was talking, he felt a warm breeze coming from his neck.
My sister's voice sounded softer than before: "Aren't we brothers and sisters, Nini?"
"This kind of thing is normal. Some of my classmates go to the bathtub with their brother or father every day..."
"..."
The slightly confused young man heard a hypnotic whisper behind him, and his mind went blank.
Since, such an innocent and pure sister said this?
Is it really that my ideas are too old?
but...
This kind of thing...
"hiss--"
Just when he was hesitating and confused, the 'girl idol' found an opportunity and took the opportunity to break through the defense!
Came to his bulging and strong chest muscles.
And because the young man was sitting on a small bench at this time, he also felt that his back, which was covered by cold shower gel, was suddenly covered with a piece of warm...
Is my sister really in a state of no armor now? !
"Sniff? Why does my brother's shampoo smell weird? I don't seem to have such astringent shampoo at home..."
"Idiot, no... don't talk nonsense... this is my new Bao Shampoo!"
...
After a while...
Nakano Mayu's expression tightened as he clenched his teeth.
With a 'pop...' sound, a certain 'girl idol' who was just trying to push her boundaries was captured again.
"Nanako..."
He gave no more advice.
Because he feels that the current sister cannot be persuaded by words.
'Click...'
He stood up and turned on the shower head. The warm water rushed down, washing away all the shampoo foam on his head and all the shower gel.
As the bubble seal was lifted, Nakano Mayu, who regained his sight, looked down.
What appeared in front of him was the foamy shower water, and two 'girl idols' as white as green onions sticking out from behind.
While singing and dancing in front of him, he was also helping to rub and wash the boy's rough skin.
Maybe it was because the temperature of the water flowing above his head was too high. Nakano Mayu felt his body getting hot for no reason.
But at this time, although he had released the seal on his sight, he was still trapped in the "unarmored" state of his sister.
If he turns around now, or makes a move to stop him.
I will take my unarmored sister...
Along with Riho-chan and Quail-senpai, I also left a file in the super-powerful printer deep in my brain!
This kind of thing...
If it really happened, I would still feel very burdened...
But just as he was hesitating, the smooth and translucent floor tiles in the bathroom were washed by the water and reflected through the water.
The boy who was lowering his head saw the dark blue school swimsuit on his sister...
"..."
He grabbed the bath towel hanging next to him and wrapped it around his lower abdomen, then grabbed the white palms with a 'snap' sound and turned around.
"Ah, Nini, don't turn around, I really..."
Before Nakano Nanako finished speaking, she had already looked into the young man's deep eyes that were burning with blazing flames.
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