Karin, a working gravure model, enrolls at university to experience an ordinary college life and joins a club with an upcoming freshman welcome party. Her boyfriend worries because alcohol quickly makes her carefree and uninhibited. A video meant to reassure him instead shows her tipsily smiling while a group of loud party boys paw at her body. When she stops answering his calls, his imagination spirals: have they taken her away, fondled her breasts, penetrated her wet pussy and made her enjoy it enough to start riding them herself? The unbearable NTR suspicion will not leave him.