A clear and virtuous housewife, 'Yoshio'. Her husband was a classmate from her university days who studied genetics together in the same seminar. After marriage, Yoshio, who had distanced herself from research, agreed to help with it again as a condition for her husband's professor recommendation. However, this was a trap set by her former mentor. What awaited her was anal pleasure torture, bound and raped anally in front of her husband under the guise of research.
