What if she is the real Seori?

1. During the childhood incident, her soul was stolen and switched with the past.

2. The Seori that lived as a "bad actor" in the present was the past soul.

This explains the following:

A. Present Seori easily adjusted to the modern world

B. She has memories of the childhood incident

C. The "bad actor" version was the soul from the past, the modern world is very alien to her, she probably thought it's hell or punishment

D. Why the Seori we know was very brave and vocal even in the past, because her real childhood was in the present. Deep in her subconscious, it's telling her that, but consciously she thought it was a silly childhood dream, probably "evil" so she tucked it away.

Originally, we assumed that the Seori we know in the present travelled to the present when they were still kids. But if you think about her lif as a childhood actress, it won't make sense if it was a temporary thing. It's not easy to become an actor, a child at that. It takes years to train a child to understand acting and land roles or commercials.

This tells us that her parents were already training her. Probably even enroled in an acting school, until she finally got a break. When she became famous, their creditors started calling but they can't pay their loans yet, so they committed suicide. Blame it on them while ensuring their kid leaves a good name instead of living with the sad news.

But their plan failed because (1) her soul was stolen and teleported to thekpast, and (2) she was saved and grew up with her grandmothe, or at least a different soul, the one from the past.