Wakana Kanae, a high school girl, obtains a free trial supplement. Deceived by a promoter, she is lured to an office where she is forced to ingest an aphrodisiac, causing her body to heat up uncontrollably. Awakening to pleasure, she ends up having sex with a man on the spot. Soon after, she is gang-raped by the man's accomplices, treated like a sex toy as degenerate men take turns raping her. Even as she is drenched in cum with repeated facials, she begins begging for more. The path she entered through a free sample is one from which there is no return—a world from which she can never go back.