【Inter Heart】Iinari Sisiiro: The sister-in-law who can’t be honest with you, Yuu Hanashiro [Android version].

Story
The life of the protagonist [Gon], an ordinary man himself, is transformed by his father’s remarriage.
This is because Yuu Hanashiro, the girl who has been a thorn in her side in terms of grades, athleticism, and everything else, has suddenly become her older sister.

She is always looking up to him, and he unintentionally witnesses her masturbation, and their relationship changes from there.

Characters
The sister-in-law who can’t be honest with him.
Yuu Hanashiro (CV: Mai Sakurakouji)
No matter what, you can overcome it with the power of your will.
She is an intelligent, sisterly girl who never doubts that, and has overcome anything with her efforts.
However, these days, no matter how hard she tries to contain it with her willpower, she is often at the mercy of her intense sexual desire, which rages like a storm, even though she feels disgusted by it.
I need to be more firm, more and more.
This is why she tries to get the upper hand on the boys in her class who have become her brothers-in-law after her parents’ remarriage, along with her innate competitive nature.
However, her fate takes an unexpected twist when she unexpectedly witnesses her brother-in-law’s violent masturbation scene.