The father and son, who decided to stay at their aunt's house while renovating their own, found themselves living in a six-tatami room with their aunt's three daughters, as their aunt was hospitalized. Living in such cramped quarters with six people, the father and son became excited by the constant contact with the voluptuous breasts and bottoms of the well-endowed three sisters. As they grew increasingly aroused, the lewd sisters began to secretly tempt them...