Each sister shows off her panties to a contractor or tutor who visits their house. The man is confused by this temptation, whether by accident or on purpose. The older sister clings to the man, who can't resist the provocative panty shots and gets an erection, as if enjoying his confused expression, and reaches out for his erect penis. The younger sister, seeing this, also seduces the man. Enjoy the double seduction sex between the sisters, who are curious about the man and his erect penis, who can no longer resist.