어쩌다, 1987

If Hae-jun hadn't been curious, he wouldn't have stumbled upon a time machine. With a few button presses, he quickly figures out how to use it, and that marks the beginning of his journey as a time traveler. Yoon-young is occupied with her job as an editor for a renowned writer, leaving her little time to spend with her mother. Then, suddenly and unexpectedly, tragedy strikes as Yoon-young receives a call that her mother has been found dead.

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S01E02 - 돌아갈 수 없는 이유