Ayaka Ichiku, with her swollen breasts overflowing with milk and her lewd physical constitution, lives in a shared household with three men. Unable to suppress her desires, she descends into debauchery. Her perverted inclinations center around lactation, the skillful use of her long tongue, and an intense obsession with anal stimulation. The moment she touches a man's penis, she is completely seduced, igniting a passionate frenzy. As she becomes consumed by this heat, her milk flows more intensely, fueling her escalating lust—her very form embodying the essence of a perverted erotic mistress.