With Tatsuki's father and sister Yuki out of the house for the night, Aki, his own mother is wooed by her own son. Tatsuki takes his upset mother to his room and pushes her down on the bed.
In the room filled with the sweed scent of an incense, Aki's rationality begins to fad. Soon, the mother and son, begins to make love without hesitation and they fall into a world of forbidden lust they cannot tell anyone about.
At the same time, in a love-hotel room, Aki's husband embraces his own daughter, Yuki. Naked they devour each other's bodies. The room is also filled with the same sweet scent of incense and the father loses himself in the intoxicating effect and continues to violently fuck his daughter Yuki, making her scream out.
Tatsuki finally takes possession of his own mother's body and Yuki is unable to resist her beloved father's big cock... The curtain is not yet about to come down on their forbidden love affair.