In a first for Madonna, real-life married twins Mio and Nagisa decide to enter the porn industry together. Nagisa married a year after her older sister Mio, partly inspired by her sister’s decision, but lately her own marriage has become sexless. When she confides in Mio, her sister unexpectedly suggests appearing in porn. The idea feels less intimidating than expected, and the twins agree that they can do it as long as they stay together.