【[expletive deleted】A story about a quiet older sister who gives [back] to her younger brother.

A story about a mute sister who gives back to her brother…

My sister Miyo has mental problems and can’t speak well, but other than that she’s a normal girl—.
I’m a younger brother who goes to the same school as my sister, and I help her out on a daily basis.

One day, I happened to peep into my sister’s dressing room, and despite the fact that she was my own sister, I felt inferior to her.

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At some point, my sexual desire increased to the point where “returning the favor" was not enough.

Then one day, I witnessed my sister masturbating, and I couldn’t help but start masturbating with her.

It’s a good thing we’re both frustrated, isn’t it? I’ve been in love with her for a while now, and I’ve even had a brush-off with my own sister.

I’m sure you’ll be able to understand why I’m so excited about this.

[Will you be my girlfriend—?]

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What do you think? This is the first time I’ve been able to do this.

[Haruto]]
The younger brother, an ordinary, talkative male student. He’s good at Japanese and English, but not so good at mathematics.

He thinks that his sister, Fukayo, is his “ideal sister. He thinks that she is his “ideal sister." He is conscious of her as a member of the opposite sex at times, but they are basically friends.

She is a kind person who cares for others, and accompanies Fukayo, who is unable to speak, to help him with what he wants to say.

She likes the back position.

[Miyo
Big sister. A female student with large breasts. She’s good at math, but not so good at English and Japanese.

She’s been in love with Haruto for a long time, but he doesn’t know about her.

She’s a bit on the shy side, and didn’t make any friends when she was little, so Haruto has always saved her.
She has made some friends and has become a bit more sociable.

I’ve been thinking about Haruto as a person of the opposite sex for a few years now, and I’ve had some conflicts and distanced myself from him.
He sees the fact that he can no longer speak as an opportunity to get closer to Haruto.

She doesn’t like to wear shabby things and likes to keep her clothes simple. He likes to wear simple red-framed glasses only when he studies.

She is sexually active and masturbates regularly.
I’ve been learning about technique by watching videos. He is what we call an ear-deep.
I like cowgirl and side position.

This story is fictional.
This story is fictional and is in no way related to any real person, organization, or incident.

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Author:Sebire

13 basic CGs + alpha
228 CGs including differences
Includes [Ver. without dialogue] and [Ver. without dialogue and sound effects].
PDF version of the main story included