When his father dies, Shuji Machiya goes to the house his father was renting to collect his possessions. There, he meets his father's mistress, Sakie, who's been waiting this whole time for his father to come back home. Sakie's popular with the men in the neighborhood and it turns out that she's actually a hungry succubus who later appears in Shuji's dreams to suck him dry!! How will Shuji survive living with her...!?