Continueing with the title, it takes time for Final to fully be in control. Although eventually.. you won't be able to move your own body. You've given into the bastard, and now he controls it.
Your movements and your thoughts.
If you try and back out once you realize what he's done, prepare for a lot of suffering. If you succesfully throw him out of control, be prepared to be stuck in a dreamworld, where he has full control. You can't shake him off, and if you try and end yourself.. you'll just wake back up in the dreamworld again.
There's no way out, until Blank appears. ..But Blank hasn't been seen in a long time...