Mother and son, who have a forbidden relationship that is unbecoming of a parent and child, have been waiting for the day when father will leave home on a business trip. At first, they thought it was just an accident, a one-time mistake, but they never imagined that their physical compatibility was so excellent... They are unable to make a move on the best sex partner in front of them. They want to quickly confirm that feeling. And for the three days until father returns, they want to savor the greatest pleasure and devour it to the fullest. They each bring the items they have bought for today, and are fully prepared, and finally the "ultimate incestuous ecstasy" begins.