The Arashi Detective Agency handles only special cases, and one of its investigators obtains solid intelligence about a staffing company, "Nice," secretly involved in human trafficking. Ai, a beautiful ninja detective and assistant to Arashi, becomes a target due to her beauty and goes undercover as bait to infiltrate the enemy brokers. She successfully infiltrates Nice's secret organization, but when Arashi is taken hostage, Ai falls into enemy hands. The broker interrogates and tortures her, then prepares her for auction as a sex slave by subjecting her to sexual training. Drugged and stripped of reason, Ai is overwhelmed by lust. In this state, a slave's massive cock—coated in drugs—is rubbed against her mucous membranes, driving her into unbearable pleasure. Through this intense sensory torment, Ai's entire body transforms into one hypersensitive erogenous zone. Finally, she is put up for auction as a sex slave, inspected and evaluated by numerous bidders. Will Ai ultimately be sold off as a slave?