Suddenly, le twin plot point
You know, the author bottled the bloody premise. I am sure all of us are drawn to this series because of the simple fact that this is a story about how young people with traumas (realistic one at least) having to, well, fix their life. It is something that both the victims of said traumas can hopefully related to and be able to share the pain, and for those that are fortunate enough to avoid it to have an insight in how those that aren't that lucky have to.
But now, if they introduced this twin plot, I honestly will be really disappointed. How many people can relate having to replace a dead twin? There are countless way the author can go with this, and yet the author decided to choose the most fucking cliche and boring path possible. This series started as a collection of trauma souls looking to heal themselves, and now we got what is basically a cheap Korean drama. Hopefully the twin is just a metaphor of sort that Kanon is now having to seperate herself from her "idol" twin, like the idol thing has managed to make her created a second personality or some sort and now that her idols works are done, she needs to readjust to the non-idol self and it's making her having a personality crisis