Husband Takashi’s love for his wife, Tsubaki, takes a dark turn when an unfamiliar desire awakens within him—the intense wish to see her having sex with someone else. But the thought of another man taking her is unbearable. So he turns to Akari, his lesbian friend from college, and asks her to sleep with Tsubaki. At first hesitant, Tsubaki gradually succumbs to the pleasure, experiencing orgasms unlike anything she's ever known. Watching her ecstasy, Takashi feels overwhelming arousal. But soon, Tsubaki begins acting strangely—growing closer to Akari, ignoring Takashi’s words. Their relationship slowly begins to unravel…