Basically, the system is just similar to the other. All you have to do is to roleplay as your character, following the story's path.

How do you determine the story's path?

I'll become the story master, who'll guide each player to what to do so the plot won't just go anywhere cluttered, as I really dislike cluttered story.

I'll tell the players what to do, but they are free to make any story or roleplay based on my order. For example:

Then as player, you are free to improvise my order. You can hide somewhere, run as fast as you can, join force together with other player to distract the dog, etc. I'll also mention the RP's setting, unless I say that it's up to the player.

I'll also become the NPCs. Some events require unknown characters and creatures to make a move on your character, that's where I'll play my part. I won't have any major character, but I'll make sure the story is going smoothly without being unordered.

If you, players, have suggestion to the story line, or isn't quite happy with my story line, please tell me (kindly and politely) so I can think about the story line once again. Even I am the story master, I want everyone to have fun together. ^^ Do not hesitate to ask me anything if you're confused or sort.