The main character, Takamiya Haruto, is a university student who is surprised when he is asked to help out at work and goes to the company where his sister works. Because it was an erotic game company that my sister worked for!

Haruto's sister is a staff member at the erotic game company "Ramune Soft." His work in progress is reaching its climax, and he needs the help of a cat. Haruto has no knowledge of the company, but he can't refuse the request and starts working at Ramune Soft.

But to my surprise, all the staff at Ramune Soft were women.

Surrounded by attractive women who are passionate about creating erotic games. Will Haruto be able to find a beautiful love like in the game (=eroge)?