Once mother and son, Hiroaki and Natsumi. Six years have passed, and when they meet again, both have transformed into entirely different beings. Yet their longing has grown deeper, stronger, and increasingly forbidden. Natsumi reveals her voluptuous body, drenched in sweat as she becomes swept up in a whirlpool of desire with Hiroaki. Between them blooms a new emotion, a new lust, and an endless expanse of taboo pleasure. In that moment, a new form of love—and a new vortex of desire—is born between them.