Housewife Onoe was haunted by nightmares of past penile band rape. Akiba, a pharmaceutical sales representative, finds a clue about the rapist, 'a woman with a chest tattoo,' from her conversation with Onoe. Uzuimizu, an insurance company employee, one day forcibly kisses Akiba who had come to the company but she escapes midway. At that moment, Akiba sees the 'tattoo' on Uzuimizu's chest. Convinced he is the culprit, Akiba joins forces with Onoe to exact revenge by shoving a penile band into Uzuimizu, but falls into his trap and becomes the victim of the aphrodisiac penile band...
