Any drama like W:two worlds where ML is a book/comic character and FL and ML cross worlds between them? like going into the book and then coming back to real life. 

but i want three things :

1. ML is the character

2. FL is the human

3. both characters are able to (atleast once) enter each other's worlds

4. FL is the creator of ML and ML's book

So for me personally the most similar to W was Lost Romance .  All the criteria are here available, like fl being the author of the novel, ml turning up in her world etc. etc. So if you haven't seen it, might check that out first ;)

And then it gets more tricky. Most dramas focus only on one character falling into the novel/story of the other. There is one execution being:
Someday or One Day - this one is a little tricky though. There is no novel per say but each character does end up in the world of the other. So it fits a lot of criteria apart of the novel aspect.

Dramas where the fl ends up in the world of the ml but not per say reverse:
The Romance of Tiger and Rose
Fall for you
Miss Ye in Wonderland 

  • Please Don’t Spoil Me (there's five seasons) - FL is the writer, ML is the book character. She crosses to his world, then he crosses to her world.

Also these have some but not all of what you're looking for....

  • The Man Ripped From the Sky has the FL as the creator, ML the comic book character, but only he crosses to her world.
  • Mr. Bad - FL is the creator, ML the character, but again only he crosses to her world.
  • I Want to Live to the Finale - FL is not the writer but a reader who enters the book where the ML is a character. The ML then crosses over to the real world with her.
 Lou:
Lost Romance .

thank you so much i started this today

 emeraldarrows:
  • Please Don’t Spoil Me (there's five seasons) - FL is the writer, ML is the book character. She crosses to his world, then he crosses to her world.

Also these have some but not all of what you're looking for....

  • The Man Ripped From the Sky has the FL as the creator, ML the comic book character, but only he crosses to her world.
  • Mr. Bad - FL is the creator, ML the character, but again only he crosses to her world.
  • I Want to Live to the Finale - FL is not the writer but a reader who enters the book where the ML is a character. The ML then crosses over to the real world with her.

thank youuu