Image imported from derpibooru
Original Description:

The small talk amongst the students in the living room came to a halt as their teacher Fluttershy slowly walked….um slithered into the room. A few of them had seen their teacher in her naga form

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but she’d never taught a class in this form, and the ensemble she was wearing was new to all. Coming to a halt in front them she took a moment to flick her mane to one side with her left hand as she addressed her students.
“Um, good evening. I hope you’re all doing well. I recently got this outfit and I thought it would be fun this evening’s class if I wore something slinky and black. Hope you like it.
I was recently discussing nagas with someone and this image popped up. My most vocal muse Petina saw potential in it, so last night this little vignette dream popped up in my anthro MLP dreamscape. Enjoy.
Edit. Yeah I know the outfit covering her belly scales would normally restrict her movement, but hey it’s fantasy.