What is she reacting to?
Her expressions are perfect - great to see what's going through her mind. The tags are also a nice touch and help to further build the story here. Kudos once again.
You guys must be new here. It's a colored remake of this of a gif the Admin made a while ago.
She's reacting to the lingerie she's wearing (hint: she likes what she sees).
I'm hardly new here, though it's been some time since I looked at the previous animation. I enjoy it when a piece gets revisited like this.
"It fits and..."
"Wow, I look kind of sexy...."
"I wonder if Master will get hard if he sees me...
To be honest, the arms need a bit of animation, she looks stuck in that one position as she realizes she likes being showy