Ichika's romance with her senior teacher at work blossomed into marriage, and even after getting married, she continued to work at the same school as her husband. One day, her husband witnessed a scene of bullying and, unable to suppress his anger, assaulted a delinquent student named Gouda, causing him an injury. "If I sue, your husband will get fired, won't he?" Using that mistake as leverage, Gouda set his sights not on the husband, but on his beloved wife. To protect her husband, Ichika accepts Gouda's demands. However, the relationship that began with blackmail gradually begins to change Ichika's heart and body...