My younger sister's name was Minori, and she was suffering from a certain disease. That is "uncontrollable sexual desire". Her older brother feels pity for her and decides to keep her younger sister isolated and confined in a unit bath. Her sister is always looking for a penis... The brother decided to continue raping his girlfriend's sister. Her sister cums when she touches her and feels the pleasure of having her throat fucked hard. Her brother's thoughts for her sister cause even more misfortune... 
Free points worth 1,000 yen for the first time!
