David Sun:
About hearing aid, the original scriptwriter replies this as NO.11 of "More info" in the following link:
https://mydramalist.com/discussions/some-day-or-one-day/46677-translated-very-long-has-spoilers-interview-and-other-infos
The Korean remake provides the explanation exactly same as I thought, but it is so easy to guess.
So far, I don't believe the original scriptwriter's answer. I guess he must make this part too complicated to make sense. You know that guy really tried to make the script not easy to guess.
You dpon't believe the scriptwiter's answer that it got cut because of time constraints? THAT'S bizarre. It's the simplest and most likely explanation. TW Dramas are always longer than they should be anyway, and every Drama everywhere has scenes cut because of time constraints. Why would you doubt the person who actually wrote the script? They have no reason or motive to lie, which is what you're saying they did.