On the verge of turning thirty, Ayaka Tomoda struggles with her ever-increasing libido. While her husband is away at work, she gives in to her desires and engages with various men. One after another, new partners appear—her local delivery man, the neighbor's husband, a casual hookup from social media. But her lust knows no bounds, and eventually, she even reaches out to her own son. This impulsive behavior will profoundly shake her life.