I'm a very big fan of HYD so when I saw that the second series was coming out in a show I was quite excited.
Currently the Manga series is still being written (I have not read it), so I figured things wouldn't feel fully finished in the ending. (Especially because it's only 11 eps),

It's got a very similar feel, there's an "F4", a "strong willed poor girl" and a "dumb rich guy". Even the whole boy from the band in the drama and a token sad Utada Hikaru song.

But this drama is just that. It's a similar feel, but you wouldn't even really have to have watched HYD to watch this show.

In the long run, if you feel like watching it as a fan I'd go for it (maybe).
The flow of the show feels weird, I can't tell if it's the writing fully, or if it's writing and bad direction for the actors to follow.

I didn't even really cry except for the cameos. Sweet moments touching on the legacy this show was -trying- to follow.