大人向けコンテンツの説明

開発者はコンテンツを次のように説明しています：

All the characters in "Onii-chan Asobo" are over 18 years old.

Mature content intended for adults only: scenes of sexual nature and consensual sex. The text contains scenes of sexual nature and detailed consensual sex descriptions.

このゲームについて

Genres: Kinetic Novel, Eroge, Slice of Life, Romance.

Koichi Akiyama, an ordinary 22-year-old game developer, has been living a boring life until one day his younger sister Ai paid him a visit.
Soon after Ai moves in with Koichi, she claims that she wants to become a game developer too, so her brother has to teach her everything he knows.
The only problem is that Ai wants to create Hentai games, which puts Koichi in a dubious position.
From now on these two need to learn how to work together and explore all the difficulties of writing Hentai stories.

• HD 1080p window & full screen options
  
• 50+ Beautifully illustrated CGs
  
• Original Soundtrack