My husband's boss

Erina buys the detached house she has longed for and lives happily with her husband. I met my husband at work and got married. Elina supported her husband as a full-time housewife. One day, Sagawa, her husband's boss and caring for him, visits her. It was thanks to Sagawa that my husband was able to promote her. However, when Sagawa suddenly confesses to Erina that she had always liked her, her husband tells her that she is not good at grades and that her progress and retreat is left to her. Then, Sagawa forcefully sought Erina, who was upset by the unexpected...