Thank you guys for sharing you're various and amazing assumptions.I really enjoyed reading your comments .I hope we all meet in another drama comment section soon with the same genre where we can again together make various assumptions(. ❛ ᴗ ❛.)
There was no other world's Seo Kyung introduce she came from world B.In the scene where she asks Miss Oh about diff worlds and give some dates those were dates where another train would come and will destined you to another world( excluding world A and B).As you know the train thru which Do Won came was initially closed and seeing so he wanted to kill himself so that fate doesn't repeat but suddenly a train appears which leads him to diff world and thru the same train Seo Kyung goes to the world where Do Won A is present
Watching Ep 15 and thinking 'Why doesn't he (the psychologist)just direct all his anger at his mother and leave…
He is a complete psychopath. His mother abandoned when he was a child and when he found his female patients doing something relevant to their child it made him angry. and he was a patient of huntington's disease too.
10 
78 
5 
1 
2 
2 
https://youtu.be/UtQ1sa99ILQ and spotify provides all OST's too
i guess these are the only two^_^
There was no other world's Seo Kyung introduce she came from world B.In the scene where she asks Miss Oh about diff worlds and give some dates those were dates where another train would come and will destined you to another world( excluding world A and B).As you know the train thru which Do Won came was initially closed and seeing so he wanted to kill himself so that fate doesn't repeat but suddenly a train appears which leads him to diff world and thru the same train Seo Kyung goes to the world where Do Won A is present