A behind-the-scenes look at a lingerie shop's backroom sales operation. Four schoolgirls in uniform come to sell underwear, but are subjected to lewd pranks by the shop staff who deliberately stain their panties. The innocent beauties are realistically shown being stimulated with vibrators and led into pleasure. A busty uniformed girl, seeking extra pocket money, takes a man's penis into her mouth and swallows his semen. While masturbating with a vibrator, her uniform becomes disheveled as she sweats and climaxes ecstatically. Another pure, naive schoolgirl succumbs to financial temptation, providing sexual services to an older man, resulting in her genitals becoming soaked and writhing in agony as white arousal fluid drips from her.