Using AI to comfort those who lost or losing their loved ones seems to be a good intentionand a great idea. However, it does not mean that there are no challenges when it is really taking place.
Bai Li's story brings out a question about how a person who still denies about the death of loved ones can be comforted. Yet, a person who is fully aware the death of the loved ones, struggles between wanting to provide the comfort and at the same time wanting the other person to face the reality.
Tae-joo's virtual existence does not only bring comfort to Jeong-in, "he" also makes her relying on him. It makes it hard for Jeong-in to know what she really wants when she is challenged to make a choice.
Above the moral issues that provoke me as a viewer, I like how the director presented the stories. Some may find the movie confusing as there are changing scenes and changing characters. I like how Bai Li' reflection in the mirror to depict reality verses virtual. It's a very clever way to bring out an idea.
Overall, it is a movie that is not for "easy-watching". It is probably better to watch a few times to appreciate the theme.