Shoda Chisato, a woman who took drugs due to stress in her married life (SAN-219)

Qianli's husband is addicted to alcohol and gambling, and they often have conflicts at home. Qianli seeks advice from her brother-in-law, but instead, she threatens and assaults him. While caring for her injured brother-in-law, their sexual desire is aroused, and they eventually have sex. Their relationship continues to develop, but her brother-in-law discovers a mysterious side to Qianli.