Azumi, a beautiful woman, is arrested after her boyfriend is caught forcing her into choking games. Haruna Saeki, the investigating officer, begins a forbidden relationship with her. Driven by curiosity about the choking play, Haruna decides to experience it firsthand by engaging in mutual strangulation with Azumi to learn what she's been through. At first, Azumi chokes Haruna, making her roll her eyes back and faint. When Haruna regains consciousness, she awakens to the pleasure and now takes her turn, choking Azumi. Though Azumi believed only amateurs would break under such intensity, she cannot withstand Haruna's powerful grip—her tongue lolls out, her eyes roll back, and she loses consciousness. Using gloves and ropes, they repeatedly strangle each other, eyes rolling back, drooling, losing consciousness, blending pleasure and pain until their minds begin to shatter. The intensity and passion deepen their bond, driving them into a forbidden drama of love and obsession.