After moving due to her husband's transfer, Koharu finds herself drawn to Chisato, a kind and seemingly supportive housewife neighbor who is always there for her during her husband's frequent absences. However, Chisato's true intentions lie in possessing Koharu's body. She begins to manipulate and dominate Koharu, forcing her into intense pleasure. Gradually succumbing to these sensations, Koharu loses all sense of self-control and willingly descends into forbidden desires.