Two beautiful sisters find themselves together in a mixed bath. Each sister seduces the target man, unaware of the other's actions. The man is confused, thinking that they might be teasing him, and the seduction they take turns to escalate, from panty shots to breast shots, and eventually to vaginal shots. When the man can no longer withstand the sisters' double seduction, each sister, excited by the pleasure of showing off, begins to demand sex...!?