A virgin brother desperately wants to have sex with his big-breasted sister, Mei. He sets up hidden cameras all over the house and approaches his sister... but her sister says, "If it's just a kiss..." He doesn't know that this will be the beginning of the breakdown in their relationship. The brother can't get enough of just a kiss and once again asks his sister to take his virginity. Unable to resist, Mei accepts her brother's dick raw. From that day on, they begin a life of incest that they can't tell their parents about. Gradually, Mei's body also begins to crave her brother's dick.