After being betrayed by her boyfriend, Kana Mimura was devastated, having devoted herself completely to him. But he cruelly spread rumors to his friends, calling her a "slut," an unforgivable act that shattered her. Overcome by rage and sorrow, her friends turn on him in fury. Right then and there, Kana's revenge begins. With a relentless series of face-sitting chokeholds, she delivers them excruciating pleasure bordering on asphyxiation. Her assault is ferocious, like a waking nightmare. Through this vengeance, she utterly consumes the darkness in her heart.