Hello! 
I was surfing on net and tried to solve this question.
Where's the other 3 worlds in the game?
Will they be developed, or not?
Can I get a full story of the game like an Anime serie,
which contains short stories but it has a well-written storyline?
You know that I'd like to know if 7 worlds is really acceptible,
over development or what's going on?
I'm waiting for Your answer ROSE Online Team!
Thank You very much
and have a good day!
