She and he were two people who lost their way in love at the same time and warmed to each other. The two made a contract to become husband and wife, but they agreed to never fall in love with each other. This way you won't get hurt.
But she was horrified to find that she was gradually falling in love with him. In order not to violate the agreement, she filed for divorce. However, she seemed to have an inextricable relationship with him and could not get rid of him.