I guess I still like it a lot because I appreciate that the drama kept my interest the whole time. I wasn't bored, and I didn't skip. Since suspenseful dramas stress me out quite a lot, the frequent comedy here kind of put my heart to rest, mostly when needed. In my opinion, though, this is also it's weakness. The comedy was out of place most of the time and when you just thought something really big happened, they just took it away with silly music.

Story:
The story overall was good. It wasn't the best in my opinion and pretty predictable in an unpredictable way (when you know what I mean) but at the same time fascinating. At some point, I just thought that the writers tried too hard to lay every possible difficulty in their way, and it got a bit annoying. Also, if you are looking for romance, there isn't really any. I mean it does seem like it, the whole time, but the romance plot is more like an anti-climax.

Acting/Cast:
The acting was great. Everybody fitted very well into their roles. There were some roles, I found a bit annoying and at some point I wasn't sure if it was the actor's acting or the actual character that made me cringe. Overall, I don't have anything I didn't like about the cast.

Music:
I don't even remember the music tbh, I know, that it was used to lighten up scenes a lot, and it was used for comic relief.

Overall:
Missing 9 is a good drama. I don't know if I would recommend it, though. It's something you have to stumble on by yourself. Personally, I also think that since I watched it weekly, it kept interesting for me. Probably not the best drama to binge-watch.