Two sisters from the countryside come to stay in the one-room apartment of an older brother who lives alone in the city! He is curious about his two grown-up sisters' bodies, but the room is small and he has nowhere to escape and is at a loss as to where to look. And even though he wants to avoid getting an erection from his sisters, they end up sleeping side-by-side in the small bed... Before he knows it, he can't resist their budding breasts and their asses with their panties in full view, and before he knows it, he's touching his sisters' breasts... Then, his sisters get excited and ask him for a forbidden incestuous threesome!