Rion, who used to be a designer, quit her job after marriage to become a full-time housewife. Her husband works for an underwear company, and by chance, one of Rion's designs was chosen for production. On the day of the photoshoot for Rion's design, the scheduled model suddenly canceled due to illness, and Rion was asked to model the underwear instead. Starting with a test shoot, she eventually finds herself alone with the photographer, who gradually requests more and more provocative poses. With each click of the camera, her arousal intensifies. Shame, anticipation, and excitement overwhelm her, her pussy starts to get wet, and she climaxes repeatedly with a stranger's cock. "I'm sorry," she moans, "I couldn't help but give in to my instincts and drown in pleasure over and over again."