HBAD-311 A female college student, Horiikawa Mao, who was found having sex with her brother and then ended up having a relationship with her father over fifty years old.

A family of three, consisting of a brother, father, and daughter. The brother and his college-aged sister have a physical relationship; every night they indulge in pleasure together. The sister is overwhelmed by her brother's massive penis. However, will this dangerous relationship be discovered and ended by their father? Intending to punish her, the father cannot resist his mature daughter's eroticism and ends up penetrating her deeply. A rotten three-way incestuous affair begins.