Over complex a simple story

A simple story, travel back in time to correct the future, but due to the constant time flipping it is so annoying and unnecessary. I lost interest in this. I only watch this as KD is doing a remake of this. I hope the KD does not make a mess like this.
Also she is not beautiful and for a Taiwanese girl so guys chasing her and dying for her lol makes me laugh.
If you are bored and happy to sit in front of this drama, non stop, and do nothing, you might understand and follow the story, but in 2023 who has time. Maybe ppl was lockdown in 2020 so they had time to sit and watch as they was nothing to watch.
A bad boy gets beaten by up by a nerd doctor, please....

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