The ladies' men are often very lucky in life, especially when it comes to love, typical is the lucky guy in the movie. Not long after getting to know the older sister Ono, the younger sister Kyono has unexpectedly fallen for him. When he decides to visit their home, the two sisters discover this astonishing situation, yet they do not abandon their relationship with the guy. In fact, the two sisters are very united and persistent in their romantic feelings to the extent that they are willing to engage in sexual relations, enjoying each other's bodies.