a lot of unanswer questions

1. his father in 1995 just only hurts his ear ,but he still can talk but why? for 28 years he never talk?
2. what happen with yoon chung ah before ha eungyeol back to 1995? how she becoming so poor?
3. what happen with choi se gyeong birth secret? her mom death and her adoption
4. why choi se gyeong nice with yoon chun ah?
5. chung ah mother?
6. it really doesn't make sense, oh eun ya goal is to find her mother's first love, then make them together? But her mother has gone to the US, even if she is close to her mother's first love it won't change anything, because they are different people. so this is a useless effort
7. so choi se kyung first love is oh?
8. about oh eunya suicide friend?
9 and in the last how eun ya know that who the la vida music man is? mr jonathan young face in magazine still same with 1995
10.didnt know what happen with yoon chung ah and ha yi chan before ha eungyeol back to 1995
11. didnt know what happen with choi se gyeong and oh eun ya after they back to 2023