Ane o Tasukeru Tame Nokosareta Shimai o Kegasu Haitoku no Hibi

Ane o Tasukeru Tame Nokosareta Shimai o Kegasu Haitoku no Hibi is a Japanese erotic visual novel about a man who is forced to perform sexual acts on his sisters after one of them is kidnapped.

The player takes on the role of Shinichi Ogura, a young man who gained three stepsisters when his father remarried after the death of his mother at a young age. Despite the fact that his father and stepmother are frequently away for work, Shinichi lives a peaceful life with his stepsisters—until the eldest, Kasumi, is kidnapped. When the kidnapper demands that Shinichi have sex with one of his younger sisters in exchange for her safety, Shinichi reluctantly caves to their demands, but instead of saving Kasumi, the kidnapper's demands only continue to escalate. Shinichi's childhood friend, Makoto, and his teacher, Naoko, also become trapped when they try to investigate.

The player's decisions throughout the game determines how the story ends.