First two seasons are great, they depict lili's childhood and sister suitor dilemma, while also depicting various psychological traumas and mental anguish very well. Art is amazing, and the relationship dynamics between all the main cast is greatly fleshed out. So the issue, as others point out, is 3rd season. While not as bad as others make it to be, effectively the season has no driving purpose moving the story forward. What I mean by that is that the main problem(Julianne's love candidate) has already been solved, and the story is now focusing on Lili's love life, but it doesn't move forward in any waydue to Lili's psychological state (which I don't have issues with, but the events that happen could try to develop better). The issue is that you could give a 2-3 chapter summary of s3 for notable developments as part of the time skip introduction. I also thought the physical fighting parts were a bit out of place, seeing as that is not the tone of the manhwa. Still, I did enjoy s3, even if it mostly just serves as an intro to a now grown(physically, not mentally) Lili. Art is still amazing as well.

Hopefully s4 is better with character and story development, 9/10 for first two seasons, 6-7/10 for the third.