First, let me teach you about filtering. It's the point of view character telling the reader what sense she used to experience what's happening, or that she used her brain to figure something out or remember something. Not only does it add needless words, but it adds "psychic distance" between the reader and the character's experiences. You can look for the words that commonly filter: knew, thought, considered, regarded, wondered, noticed, was aware, sensed, felt, saw, hoped, realized, smelled, heard and it seemed, looked like, appeared, was obvious/apparent. Decide on a case-by-case basis whether it's there to filter the point-of-view character's experience, and if it is, rewrite it.
So we'll start with getting rid of what the POV character used to determine what her master was doing. That leaves something like: My master loomed over my shoulder, holding a chain that connected to my collar. (Or whatever there is to connect it to.)
Is this sexual material? A master must be male, or present as male, and in a submissive character's point of view, the title is capitalized. A "female master" is generally a Mistress, Madam, Domme, or similar title, also capitalized.
The reader needs to know more that what the POV character sees. If she feels the need to look up at her Mistress, it's for a reason. Did she feel new weight on a collar? Hear chain clink? Feel eyes on her?
And last, get some feeling in there. How does the narrator react to being chained at the neck, both physically and emotionally?
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