Miyo marries Tsunao, the owner of the real estate company where she used to work, and begins a new life with her younger sister Mayu, who has moved to the city for a job. One day, Teiya, Tsunao's close friend and former junior from university, visits them and quickly becomes intensely interested in Mayu. However, Mayu rejects his advances, causing Teiya to grow increasingly frustrated and resentful. As tensions rise, his dark desires begin to surface, leading to a series of events that drastically alter the lives of all three.