I found the early stage to be very interesting. Recently, there have been a lot of stories about sisters changing marriages, and the author handled it very well. Both sisters were informed and agreed. Different from other books, although the younger sister is innocent, she is not too silly and sweet in the description. However, when I read the story of the older sister and the couple, I gradually felt bored. It's a classic strong alliance, but the more I watch it, the more I can't stand it.
The early and middle stages are interesting, but the later stages are more boring. The final ending is also very perfunctory even though it is a plot line.
