1. what happened in the past credits roll scene? like, i didn't understand why hyeonsoo (wooshik) and his mother were laughing at the end.

2. couldn't understand how the wonderland program worked. the dead people's mind were there in their AI versions or weren't?

3. couldn't even understand if or how the characters had feelings for the AI versions of their beloved ones. we can clearly see that they hug up the phone calls without saying goodbye or anything, showing that they don't really care cause the AI people aren't real at the end of the day. so why they signed up for the wonderland program anyway?

4. why taejoon (bogum) was totally different when he woke up? why jeongin (suzy) ran to taejoo only when he was far away? why taejoo was mad or confused (didn't get how he felt) when jeongin showed his AI version?

5. why sung joon (gongyoo) had romantic feelings for bai li (tang wei) if she was dead?

6. if sung joon could enter in bai li's program, why they didn't bring her child to see her? and as they had the possibility to enter in the AI world, why this wasn't the main program instead of the phone calls one?

7. when haeri (yumi) canceled jingu's (jungsang) program cause apparently his grandmother was dead, why she told him instead of just stopping the program? and she was being serious or just wanted an excuse to end his program cause he was bad towards his grandma?
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besides all my doubts, i didn't felt any compassion for the characters as they weren't well developed.

i just rated 5.5 because the cast was full of amazing actors and they did awesome. it's a pity that the screenwriter didn't gave them a good story and development.