As a typical romance drama set in a fictional factioned aristocracy, Ellie (MC) has a drive and agency that is more typical of an isekai heroine. A lot of the events where she stands up for herself in typical ways of the genre (vs the father in law duke, vs the jealous relative, vs the manipulative royal, etc) are very one and done. She fights and the other party completely accepts the way she has treated them, even if she is leagues lower in class or relevance, due to the magic of fiction. The story also doesn't explain how she gains the audacity to fight or learns how to navigate newfound life as a duke's wife, chalking it up to Ellie just having a crusader personality and her own family being very ideal. Her relationship with Zachary, the main love interest and pitifully abused turned strong willed duke to be, is a good portrayal with a natural build up though. Ellie's maternal ideals influences Zachary to be protective, and they grow together into their own roles comfortably. The story never goes into any romantic aspects of their relationship, and we are expected to believe Zachary and Ellie are infatuated with each other despite Ellie kissing Zachary for the first time (on the cheek for that matter) after YEARS of living together. Zachary is also pretty one dimensional as a character, we never really see how he interacts with anyone but Ellie and the only times his personality change is to reinforce Ellie's presence/actions as a net positive.
The B plots are plenty interesting and keeps slowly introducing clues, such as the mysterious illness in the Duke's family or the relationship between the current Duke and Zachary's mother. The art is nice to look at and has more than enough details for a webtoon series.