Overview:

Free Research On Making A Baby With Your Flat-Chested Sister is a mini-game for masturbation where you can easily enjoy obscene erotic scenes in a perverse worldview!
A perverted older brother who checks out the flat body of his innocent, pure younger sister and ends up impregnating her.
The older brother decides to carefully examine his cute younger sister’s body as an independent research project.

Easily enjoy H-movies within the game based on the story and setting!
A game with no unnecessary branches that specializes in erotic scenes for masturbation.
Enjoy the perverse setting and worldview, and the erotic scenes for masturbation!