While working at a uniform massage parlor, college student Yukina gets approached by streetcasters pretending to interview her for a web show. They try to take her somewhere, but she refuses, saying she's on the clock. Unwilling to give up, the crew returns later as customers to win her over again. Through massage and conversation, they get her talking—eventually revealing her deepest insecurities. Though she has a boyfriend, he's low on libido and packs a tiny cock, leaving her sexually unfulfilled. She admits she's never had real sex and finds masturbation the most satisfying. Seeing her pent-up frustration, they propose an off-the-record special service. To their shock, the 19-year-old agrees—and delivers an unbelievable blowjob. Using expert deep-throat technique, she swallows the entire shaft, slurping noisily until they explosively cum inside her mouth. Attempting to push for full sex on-site, they realize getting caught at work is too risky and back off. After her shift ends, they head to a hotel to finally address her insecurities—starting with full intercourse. Turns out Yukina is a tight, big-dick virgin, and with intense, rapid thrusting, she orgasms in seconds, screaming "You're lying—it *is* possible to come!" Over and over she cums, her pale skin flushing red, back arching, her peachy ass trembling in violent climax. Gleefully stuffing her cheeks around a cock too thick to fully fit, her full-body blowjob skills are nothing short of divine. This underground service is no joke!